Probably Too Difficult For Most People

[@jimmeade2976]

Excellent science quiz, really taxed my knowledge and memory from high school and college ... which was decades ago. I'm very happy with my 88/100 score.

[@jamesshavrnoch8665]

Holy crap... I ended up at 80 correct...

[@farrcorfe]

And so you should be!

[@bothieGMX]

86/100, however, on four questions I got help from my native language (German) like on Q 20: German word for "vinegar" is "Essig" and German word for "acetic acid" is "Essigsäure" (Säure = acid). So by translating (I wasn't sure about vinegar and didn't know acetic acid at all, so I looked up both) I trivially got the answer. But on all four questions, I believe, I would have known the correct answer as a native English speaker as well.

[@oswaldoramosferrusola5235]

I am a Spanish speaking 69 years old aeronáutical engineer. I got 93 answers right. I detected a slight vías towards English speakers. The equivalence of a fathom in SI units is no science.

[@oswaldoramosferrusola5235]

​@@bothieGMXeasier for someone who understand Italiano. Acetto is vinegar in that language (which is not mine)

[@patmcgillhastings9657]

solid, liquid, gas and plasma....height, length, width, and time. Missed 4 of the questions. I really enjoy the science quizzes. Thanks Ben, for the best quizzes on youtube. You are meticulous in your presentation and correctness of answers. Please know that all your time and hard work does not go unnoticed and is always appreciated.😊👍

[@Quizzes4U]

Awesome, thank you!

[@danielklopp7007]

Actually, the 4 phases of matter are solid, liquid, gas, and supercritical fluid (but don't feel bad, everyone except physical chemists usually gets this wrong). The phases of matter can be shown on a temperature vs. pressure graph; there is no combination of temperature and pressure (in a fixed volume) that can produce a plasma - plasma is simply an ionized gas.

[@patmcgillhastings9657]

@@danielklopp7007 thank you for this information. I am 75 and no one is too old to learn something new and learn it correctly. Anyone who appreciates education and learning as I do, always wants to learn it correctly. 👍

[@danielklopp7007]

@@patmcgillhastings9657 - I think the confusion come from substituting the word "state" with "phase" (e.g. "4 states of matter" vs. "4 phases of matter"). All middle school and high school teachers I have spoken with get this wrong (i.e. they refer to 4 states of matter as solid, liquid, gas and plasma). I then ask them to draw a phase diagram and show what combination of temperature and pressure results in a plasma... to which I get a blank stare. A plasma is an ionized gas, but retains all the same physical properties of a gas. Also adding to the confusion is the fact that at standard temperature and pressure on Earth, no substance is in the supercritical fluid phase (but we can all observe things in the solid phase, liquid phase and gaseous phase). Supercritical fluids have some of the properties of a gas and some of the properties of a liquid... strange stuff! The most common use of a supercritical fluid is decaffeinating coffee and tea (formerly done with organic solvents, now done with supercritical carbon dioxide).

[@walkerjian]

why is plasma classic?

[@torfrida6663]

88/100 which is not bad for an old artist whose last science lesson was 1962!!! Enjoyed that, but must admit to some inspired guesses. 🇬🇧👍

[@scobra5941]

Better than me- another old artist but one who never had a science lesson. I got 82...also several guesses.

[@rogergeyer9851]

When there are 3 choices, a LOT of good guessing with weeding out the obvious would help a LOT of scores significantly. It certainly did for me, and I'm now a senior citizen too.

[@cheriem432]

Excellent!

[@alfredocuomo1546]

Wow it's shocking just how much knowledge you acquire in 70+ years of life, if you were to ask me were I learned this information I'd be at a loss. 91/100 to me is great but for an old techie I'm happy.

[@marcinr7991]

Great quiz! But I'm not sure about question 97 (expanding gas). If the gas in question is an ideal gas, it is true that the temperature remains the same, but for other gases, e.g. those described by the Van der Waals equation, the internal energy also depends on the volume of the gas. If the gas expands in a vacuum, the internal energy remains constant (there is no work or heat transfer). For the Van der Waals gas, the only way to keep the energy constant as it expands is to lower its temperature.

[@TomD1999]

For a gas in a closed system, the product of pressure x volume x temp is supposed to be a constant. There is a principle that an expanding gas becomes cooler, that's how refrigeration and air conditioning work.

[@rogergeyer9851]

@@TomD1999: Which is why I missed the question. I'm 43 years out of college now, only took advanced science classes re computer science, and don't think we really covered that sort of thing in basic college physics. What you're exposed to in school is very random, and then it largely depends on job and interests. Sometimes for the layman, understanding the basic concept well is good enough for real world living, but overall, things change a LOT re much of science over time. Given space travel and telescopes, our solar system is MASSIVELY different than believed when I was a kid 50 to 60 years ago. Dinosaurs -- we know a LOT more and a lot of it is very different re the details.

[@kevinmcnulty7307]

Yeah V1/T1= V2/T2

[@MikeHammer1]

How can a gas expand in a vacuum? If there is gas, then by definition, there isn't a vacuum. I suppose the question meant to say a gas expanding INTO a vacuum.

[@davidthiel483]

yes, compressing a gas raises the temperature so when a gas expands????

[@jimmartin8853]

I always feel smarter after watching. Sometimes it's good enough to say I understand the question, even if I don't know the answer.😛

[@rogergeyer9851]

Given how much science denial there is, if you had a solid grasp on the concepts for almost all the questions, and how to generally APPROACH finding the answers where logic and knowledge works, that's very decent by today's standards overall (sadly enough).

[@specgrav1]

You get a like just for having a tardigrade for an avatar. #tardigradeforever

[@kennyearthling7965]

I'm quite happy with my 90/100 There are only three classical states of matter, plasma is not a classical one.

[@LockSpaz]

I agree, that threw me. (90/100 here too.)

[@CM-dw2xr]

I agree with that. I actually answered the question out loud " 3 or, if you count plasma, 4 ". I think the word "classical" should really be the 3.

[@faylatham3849]

I agree

[@malcolmwheale4299]

I think he may have intended the ancient Greek belief that matter was comprised of fire, water, earth and air.

[@rogergeyer9851]

I'm a concept guy, not a definition guy per se, but I guessed right on that one, thinking most people wouldn't think of plasma. I scored 93. As a 65 year old that struggles over time with gradually decreasing memory crispness and speed, it's nice to have good old basic knowledge of a subject I love come through for a change.

[@JimmyD806]

I disagree with #36. Centrifugal force is actually a fictitious force. In all cases, the force is centripetal force. It's not the opposite. It's just the only real force.

[@naveentuteja9789]

Dear Jimmy, hope you know Newton's third law. Centrifugal force is just like normal reaction for a static body lying on a surface. Otherwise, as per Newton's first law, the body in revolution would fall into the center of the orbit. Two equal and opposite forces result in equilibrium.

[@pulsar22]

@@naveentuteja9789 Jimmy is both correct and wrong. While centrifugal force is a virtual force that seems to balance the centripetal force, it is an artifact of the inertia of the body trying to maintain its straight line motion. The centripetal force acts to prevent the object from flying out. Yet you can think of the centrifugal force as that virtual force trying to keep the body in a straight line. When you draw the force diagram, you get a orbital moment, a centrifugal force and a centripetal force.

[@MrGsteele]

Er - how does a "fictitious force" elongate a tether attached to a body spinning about an axis? But more than that - it's just a word - if you'd rather use "negative centripetal force," have at it. Words are arbitrary. Centri and Fugal - "running away from the center." Seems OK; thanks, Romans.

[@JimmyD806]

@@MrGsteele This video is whacked. There is no negative centripetal force. And people call centripetal force a centrifugal force but the true force is always a centripetal force.

[@JimmyD806]

@@MrGsteele There's negative centripetal acceleration and I think that's causing some confusion.

[@europaeuropa3673]

85% with BSEE, MSNE, 2 patents, and 75 years old. It was a good review of science and I learned some things.

[@paulgreen9059]

It's eerie how the red line moves faster on the questions I don't know.

[@jladdyost]

😀

[@MarkDavila-xr6pl]

Time is relative

[@quintopia]

for me it was the opposite because if i knew it i skipped ahead :P

[@garethb1961]

Nice quiz. 91. As others have noted (maybe, probably): * Centrifugal forces are "pseudo forces" and are not real. Centripetal just means inward acting. It's an ill-posed question. * Only ideal gases have constant temp on free expansion. * Cellulose has the same energy density as starch (both being polysaccharides), if an animal has the enzymes to digest it. * Plasma was added as a state after the classical science period.

[@muskyoxes]

I don't get that distinction. If I'm accelerating, I'm experiencing a force that is just as real to me as any other force

[@garethb1961]

@@muskyoxes Hi Muskyoxes, if someone is moving in a circle, they feel they are thrown to the outside. People call this a "force" - a "centrifugal force". But in fact, there is no force. The centrifugal effect occurs because of the absence of a force keeping the person in a circular path. Another way to think of it is this. Whenever you think there is a force acting, just ask what kind of force? Gravitational, electromagnetic, tension, etc. If you can't identify what the force is, it is usually because there is no force. That's the best I can do in 100 words!

[@vicmontes7314]

@@garethb1961 Turns out Gravity is not a force any more than Centrifugal or Centripetal are if I understood Sabine Hossenfelder recent YT videos. 5 wrong of 100, I would have thought gold to be a better conductor...enzymes are proteins...with all my medical problems you would think I would know this one...Admittedly good guesses on a couple two or three. But we architects have to know a little about a lot! Not bad for a gringo, I guess!

[@Dtmdeman]

Cowabunga.

[@echelonrank3927]

* Potassium nitrite not nitrate

[@barbarahurwitz9018]

I love this quiz. Thanks. Great job

[@Quizzes4U]

Glad you liked it!

[@French-Kiss24]

As a total non-science person, I figured I get about 10% right. I did better than I thought by just being alive and somewhat informed. I got around 70%. Yay!

[@megnotes7908]

Way to go!!! 👏🏼👍🏼😁

[@komodosp]

I'm guessing you're not a maths person either 😉 - a total non-science person should get around 33% right!

[@garethb1961]

You really are a non-science person! Science buffs will generally give a number.

[@sam_c95]

I got 91/100. The ones I got wrong were 7, 23, 42, 64, 65, 88, 93, 94, 97. My excuse is that some of these were more history than science, and an imperial units conversion in a science quiz?!! How dare you!... I'm kidding of course, it's all in good fun, thanks for making these. I learnt some things, the most interesting of which were the conductivity of silver, dew, and free expansion of gases.

[@michellerichards7242]

Learnt..???

[@sam_c95]

@@michellerichards7242 Yep, learnt. British English spelling. A few other similar examples: burnt, smelt, knelt, spelt, dreamt

[@frolstty]

@@michellerichards7242 Don't be that person... Now you should feel embarrassed.

[@garethb1961]

@@michellerichards7242 Do you now concede you were in error?

[@wayneyadams]

@@frolstty If more people were "that person" we would have a much more educated society. Ignorance is never okay.

[@robertsellers9152]

Strictly speaking, more heavy water is used for drinking. 0.015% in natural water or .15 grams per liter. I expect more is consumed by drinking than used in nuclear reactors.

[@RationalSaneThinker]

That should be used BY drinking. As far as I know, the digestive system doesn't need heavy water so it's not strictly used for anything. In contrast, heavy water is necessary is nuclear reactors so it's used FOR nuclear reactions.

[@johnwest7993]

@@RationalSaneThinker, it is still being used for drinking, in the common sense of the word, as it fully suits the body's purpose, whether it strictly needs to be used in that form or not.

[@robertsellers9152]

@@RationalSaneThinker Congtats, I've been out-pedanticked!

[@jahazbrooga309]

I was really pleased with myself for knowing that answer until your statistics changed that answer! That's brilliant 🥰👍

[@ps200306]

I guess heavy water is used for drinking the same way nitrogen is used for respiration. We don't need or seek it out -- it just comes along for the ride. Whereas heavy water is used for nuclear reactors the same way nitrogen is used for making fertilisers -- they don't work without it.

[@danielrutschman4618]

If these questions are too difficult for most people then most schools are doing a very poor job of educating.

[@MedusaAbuser]

Teacher here! Yeah, I have to agree (sorry fof my grammar, I‘m swiss), most schools are stuck in the 20th centuary… Or they went in the complete opposite direction and pushed digital learning onto children at a young age. The problem that I see in lot of kids is that they don‘t learn out of curiosity, rather because they „have to“. Serving them facts and not letting them expirience the struggle and satisfaction in finding the correct answer themselves leaves them unfulfilled and disinterested…

[@jladdyost]

@@MedusaAbuser Your English is fine. Picky point that lots of English speakers miss: you mean "uninterested". "Disinterested" is a good thing and means not influenced by self-interest, as in the attitude of a unbiased judge. I agree with you that there is not nearly enough teaching that inspires curiosity and discovery, but in the US this is not because kids are required to memorize too many facts. It's because they are rewarded for regurgitation of the teacher's or some "expert's" interpretation of a work of literature, rather than having them read the book and discuss what THEY think of it. This "leave it to the experts and spit it back" way of "teaching" has not trickled up to the colleges and universities--it has rolled down to the schools from them. My brother, and English professor, was hounded by superiors and colleagues for having students actually read books and then discuss them.

[@xaenon]

Remember, it takes two to learn. The teacher can teach, but the student must put some effort in, too. Also remember that on the average, schools in the United States are getting funding cut again and again. And we have a whole generation of crummy parents who treat school like day care.

[@rattywoof5259]

Perhaps it should say "Too difficult for most Americans".

[@cheriem432]

Seriously? Gen Z cannot make change for a dollar! I've seen the videos. Pathetic!

[@annikanilsson6152]

89/100 - warmest thanks for another brilliant quiz, Ben 🙂

[@melstiller8561]

I absolutely, hands-down, love your quizzes, Ben! If I want to learn something new, I know that Quizzes4U are for me. Have a very happy Easter! ❤

[@Quizzes4U]

Awesome, thank you!

[@melstiller8561]

@@Quizzes4U -- You're welcome, Ben.

[@LJHYND]

Ugh, I only got 52/100 and most of those I made an educated guess Lol Still love your quizzes though!

[@Quizzes4U]

Thank you.

[@wayneyadams]

@LJHYND I'll bet you learned something along the way and that is more valuable than earning a high score. I taught Physics for thirty-three (33) years and my only goal was to have students leave my class with greater knowledge than they had when they entered.

[@VengerVideoGamer]

At least you're being honest. I'd bet my mortgage that there are a lot of inflated scores in the comments.

[@kathysampson826]

Got 4 wrong! Excellent quizz!

[@grantjones8690]

four wrong; me to. How did you get so smart?

[@majbach1968]

@@grantjones8690 Riiiiiiight

[@johnharris7353]

94% ! Didn't seem to help me much throughout life. I'm 71. It was more who you know and who you blow!

[@markuswx1322]

Same as my score & no one cares-it’s considered trivia by most people.

[@pzkw6759]

89/100. I always seem to B's on your quizzes. No different from school years.

[@michaelpistey4001]

That was exactly my thought Caveat, if you don’t include math. I’m terrible

[@laszlovida90]

90/100 here - 4 lack of scientific knowledge - 6 lack of language knowledge :D (I'm not native english, but i'm proud, that understood most of the questions)

[@For_What_It-s_Worth]

@Migglesworth Close: “I’m not a native English speaker, but I’m proud that I understood most of the questions.” I had no problem understanding you perfectly. There was no ambiguity in how you worded the statement, even if it wasn’t ‘perfect’ English. [ ‘Ambiguity’ is a word meaning ‘could have more than one meaning, not clear in what was said’.] That is to say, you (and laszlo) didn’t confuse your readers. Good job.

[@johnsykes9623]

@@For_What_It-s_Worth close, however, the comma is dropped with "but" or "and", though Americans like to include it anyway, it can provide gravity lol

[@For_What_It-s_Worth]

@@johnsykes9623 This reminds me of the question of including the comma, or not, (🙂) before the ‘and’ in a three or more listing. My favorite example arguing against latter is “I would like to thank my parents, the Pope and Mother Theresa.”

[@williamverhoef4349]

Also 90 and non-native but to be fair I have been for other than the first 2 years of life :)

[@ktkitty1903]

Great video, lots of fun!

[@Quizzes4U]

Thanks so much!

[@robertmegee9052]

The double slit experiment for light proves that light is a wave not both. It's the photo electric effect that proves that light is a particle.

[@benthomas9830]

Yeah I would have put just a wave for that one aswell. Still I can see where he is coming from because the single slit experiment does indeed demonstrate particle like behaviour. However as the question asked sepcifically about the double slit experiment it would not be correct to say it shows electrons exhibiting particle like behaviour.

[@scibear9944]

Disagree. When photons are put through one at a time, each detection can be traced back to one slit or the other but not both, which is particle behavior. En masse the diffraction pattern results, which is wave behavior. There is still no satisfactory explanation for the dual nature of light (or other particles like electrons and even atoms moving at high speeds).

[@whosit112]

@@scibear9944 Your reasoning is circular. You are saying that the double-slit shows that particles act as particles. Anyway, the real problem is that the question refers to "the double-slit experiment" without specifying which double-slit experiment.

[@markuswx1322]

@@scibear9944 Exactly. Matter of interpretation, and still under dispute. I got the “right” answer, but knew we’d hear some discussion about it.

[@sankaranmurthy573]

Doesn't it depend on the spacing between the slits? Wide separation -> particle-like and close slits -> wave-like behaviour, as I remember.

[@JakeBluez]

94/100 ... Fun and entertaining test ... many diverse subjects ...

[@CaptHollister]

89/100 Great quiz

[@dadananda]

Hmm... The double slit experiment shows that light behaves as waves. If particles are used instead of light, you also get an interference pattern which proves that particles can behave as waves. But the double slit experiment does NOT show that photons behave as particles - as is implied.

[@davidb2380]

You are right, the question was misleading

[@wayneyadams]

Yes, it does, because photons (quanta) behave exactly the same as electrons. Understand that when we talk about quanta we are talking about packets of energy (waves). Let me give you a similar example thar sort of presents the idea, although it is not literally true, but gives you an idea. When sound of two frequencies are generated simultaneously the result of the interaction are beats. Beats are small volumes where the sound experiences constructive interference. The beats are packets of waves that deliver there energy in bursts as though they were particles. the number of beats per second is equal to the difference in the two frequencies. The sound is still a wave but whne it interacts with your ear it delivers its energy in bursts as though it were a particle. Light travels as a wave until it interacts with matter or some form of energy. In the case of the double slit experiment, the light cannot be detected without interacting with it in some way, which then causes it to exhibit particle properties.

[@dadananda]

@@wayneyadams You still have not said why the double slit experiment shows that light behaves like a particle...

[@wayneyadams]

@@dadananda Of course I did, it behaves exactly the same as an electron. When a detector is placed on either or both slits to determine which slit the photon goes through it passes through one slit or the other and hits the screen directly behind the slits leaving two areas of light just like a particle would. As i am about to say for the THIRD time, the photons act exactly the same as electrons.

[@dadananda]

@@wayneyadams "... just like a particle would." Why would a particle go through "one screen or the other" unless it was behaving like a wave?

[@geo3106]

For Q1: Although the state of matter depends on thermal energy, it also depends on the intermolecular/atomic attraction force and how it decreases with range. This means a substance might have higher thermal energy than another, despite being in a “lower” state of matter. A better question would be: in which state of matter are the particles typically closest and move the least?

[@wayneyadams]

@geo3106 I agree, this is one of several questions that were badly worded. But he is not alone, i have seen some terible questions written by fellow Physics teachers, and even a few in our textbooks.

[@robertorodriguez5226]

Yup. Clarifying the question would help.

[@starman2337]

93/100. Biology always gets me, but the conductivity one was also interesting. I always thought silver was used as a compromise because it was cheaper than gold.

[@ps200306]

Also 93/100. Also flunked the gold vs. silver one.

[@dogwalker666]

Silver tarnishes reducing surface conductivity, Hence gold used for connector surfaces,

[@starman2337]

@@dogwalker666 Makes sense. Thanks.

[@dogwalker666]

@@starman2337 you are welcome.

[@cr10001]

@@dogwalker666 That's what baffled me, also the fact that locomotive windscreens have a very thin gold film. I had a vague memory that silver was better conductivity, but reasoned myself out if it :)

[@paulboudreau1677]

95/100 veteran high school physics teacher. Chem, physics, and astronomy questions were fine. It's those dang bio questions that get me. Great quiz!

[@wayneyadams]

Question 17. It isn't really white light, it is still red, green, and blue, but our eyes see it as white because it activates the three color cones in our eyes, red, green, and blue equally. Question 79. The two moons of mars are named Phobos meaning fear, and Deimos meaning demon, both apt names for the Roman god of war. The Greek god of war is Ares. Question 80. Aqua regia literally means royal water because of its ability to dissolve Gold. Question 82. The actual experiments carried out by Pavlov were brutal and inhumane, and today would be considered animal abuse. He didn't just ring bells and watch dogs salivate.

[@sam_c95]

This is true, but in that sense there is no such thing as white light at all because there isn't a white wavelength. We define white light as we perceive a specific mixture of wavelengths.

[@wayneyadams]

@@sam_c95 That is correct, there is no white light. In fact, the idea of color is a human invention, to the universe there are just various wavelengths of electromagnetic waves, none more special than any other. I used to do light demonstration with my Physics students. I would shine a yellow light from an LCD projector on the screen and have the students look at it through hand-held spectroscopes, and they would see just red and green with no yellow. I then projected light from a projector through a yellow filter, and they saw yellow in their spectroscopes. It illustrated the way we perceive colors which is nothing more than a combination of red, green, and blue.

[@blitzag1119]

phobos deimos arent names for the god of war, they are names for his horses

[@olliverklozov2789]

The Roman god of war is Mars. Deimos (fear/dread) and Phobos (panic/terror) are the sons of Ares and Aphrodite, not horses.

[@wayneyadams]

@@sam_c95 but?! You just repeated what I said, so why the but in the response?

[@willowwisp357]

98, I need to learn more about Becquerel. It would have helped if I had known he was Marie Curie’s teacher.

[@MiniLuv-1984]

What a great idea for a youtube channel. Kudos.

[@uspockdad6429]

Not too bad. 92/100. Some of those if I would’ve paused and thought about them, I would’ve probably gotten right, but I’m happy with my percentage playing by the time limits.

[@Dragonblaster1]

I got all right except No. 7.

[@petertattum2338]

About 90/100, Ben. There were a few 'senior moments' involved!

[@rossk4864]

I am 75 and still apparently remembering most of my high school science because I missed only three, one of them being that the largest eyes belong to the ostrich; I concluded the elephant!

[@grahamlong6870]

The question should have been, what animal has the largest eyes in relation to its body. The largest eyes must be something like the giant squid!

[@damonpearce5790]

@@grahamlong6870 The question states land animal.

[@jp-hh9xq]

@@grahamlong6870 I got it wrong, saying elephant. After your remark I went looking for redemption and didn't get it: AI Overview An ostrich's eyes are larger than an elephant's eyes: Ostrich eyes Ostriches have the largest eyes of any land animal, measuring about 5 centimeters (2 inches) across. This is about the size of a billiard ball, and each eye is larger than the ostrich's brain. Ostriches can see up to 3.5 kilometers (2.2 miles) away. Elephant eyes An elephant's eyes are about 3.8 centimeters (1.5 inches) in diameter

[@naomiparsons462]

75/100 I reckon that's pretty good for a pre-GCSE student if I do say so myself. This one was definitely harder than the other quiz.

[@sprokethead]

Just remember if Leno took this quiz to the streets...nobody would know S!

[@dogwalker666]

If he took it to a maga meeting it would be zero.

[@rogergeyer9851]

Well, certainly true when they cherry pick the ignorant ones. Generally, I thnk it very much depends on the sort of person. Most STEM career folks in college or beyond would likely do WELL, IMO. The general layman, especially MANY in high school -- not so much - like not even in grasping the question quite often.

[@reidflemingworldstoughestm1394]

Pfft... who doesn't know that S is sulfur?

[@RussellDay52]

@@sprokethead I would like to see that. Might be universally boring, though.

[@kennithprice6807]

85/100 brilliant quiz thanks again Ben I learnt a lot from that , happy Easter all the best Ken 👍👍😁

[@Quizzes4U]

Same to you. Thanks

[@michaelconner3361]

Time 25.32 is completely wrong. Im an HVAC tech and understand the laws of thermodynamics daily, Gas in a vacuum or expanded space lose temperature due to particles being separated and slowing down creating a cooler environment. Opposite is true if compressed or heated (energized). It doesn't matter what the medium is it could be water vapor but physics is physics.

[@Quizzes4U]

Thanks for commenting. I have found many references that the question is correct. I'm only going on what I've read on this subject, so if it's wrong, perhaps you could explain why. Here's one of the references physics.bu.edu/~duffy/semester1/c27_process_expansion_sim.html a free expansion, gas is allowed to expand into a vacuum. This happens quickly, so there is no heat transferred. No work is done, because the gas does not displace anything. According to the First Law, this means that: ΔEint = 0 There is no change in internal energy, so the temperature stays the same. And another here chemistry.stackexchange.com/questions/33383/why-is-temperature-constant-when-an-ideal-gas-expands-into-a-vacuum#:~:text=As%20gas%20particles%20expand%20into,particles%2C%20the%20temperature%20remains%20constant.

[@georgesmileyface]

It makes sense that it remains the same, there is no loss of energy because of transference, there is just a lower density of particles, but the molecules agitation stay the same?

[@cheriedeb1217]

It doesn’t change. You should know that the temperature of gas is measured by kinetic energy-since there is no work or release of energy how can the temp change?

[@TheHyponeoriteChannel]

The scenario is simply the free expansion of a gas against vacuum (0 Pa). Consider the internal energy of the gas is U = Q + W (or - W, depending on the convention). The work done by the gas is typically given by W = -p dV. Since p is 0, the work done is 0. Since the gas spontaneously expands irreversibly against vacuum, the change in Q is also 0. Therefore, ΔU = 0. With no change in work, heat, and internal energy, the temperature of the gas is the same.

[@yentasnivla]

83. I’m actually pleasantly surprised how much secondary school chemistry I remembered considering is not my favorite subject.

[@arlo0011]

83/100. I thought I'd do better. Great quiz - again, lots of variety.

[@Quizzes4U]

Excellent

[@Horizon3165]

I failed miserably.

[@megnotes7908]

Bet you’re brilliant in other areas. Last I knew, there were eight types of intelligence….

[@scobra5941]

@@megnotes7908 Isn't this quiz about accumulated knowledge, not intelligence?

[@jefferybelsher3749]

Try again you'll do better

[@tomwagner3874]

That apple bouncing off the womans head was priceless.:)

[@boomshankah1123]

I swear on Trump's Bible I got 100/100

[@Quizzes4U]

Awesome

[@reidflemingworldstoughestm1394]

Person, woman, man, camera, teevee.

[@cratecruncher4974]

At 25:43, the temperature of a gas DECREASES when it freely expands into a vacuum because it results in a lower energy state even though no work is done against external pressure (conservation of energy, etc).

[@bowed305]

I'm not a science guy, but this was enjoyable. Also, I didn't too awfully on this. Thank you!

[@Quizzes4U]

That's great.

[@richardlynch5745]

95 correct..... excellent quiz covered a very diverse amount of science🤗🤗🤗

[@Quizzes4U]

Glad you liked it

[@fairwinds610]

I'm a 73-year-old electronics technician, but I paid attention in General Science in high-school in 1966. I scored 94/100. Radioactive potassium in bananas? Also, the double-slit experiment demonstrated waves, not particles.

[@paulbuswell6566]

The double-slit experiment demonstrates waves and particles.

[@paulboudreau1677]

The double slit experiment done with light demonstrates that waves have a dual nature by showing individual localized photon strikes on a detector screen with an interference pattern building over time. Exactly the same result is observed when performed with electrons. This demonstrates that both waves and matter exhibit wave-particle duality.

[@therealchayd]

92/100; Some of the biology and geology ones got me!

[@tonysuffolk]

Happy to get 97. I was caught out by the gas expansion question. An ideal gas temp remains the same but a "real" gas drops in temp.

[@albixx3893]

98/100 Maslow and the volcanos got me. I still think Earth has more active volcanos than Venus, but now I'm curious and I must look it up.

[@VaraLaFey]

I psyched myself on that one. I knew Venus is significantly hotter than Earth (and hotter than Mercury too), thus it hasn't lost much interior heat, but then I asked myself about _publicly known_ volcanoes, and deserved to get the answer wrong just for doing that.

[@joepatriot363]

87 correct, great quiz!

[@susanleitch8649]

Hi Ben. Happy Easter! Bit of a disgrace, but did my best...got 78/100. Not bad for an old lady! Enjoyed the quiz as always. Quite surprised I did as well as that to be honest. Dreaded it a bit, but had to do it!😮😂❤. Thanks, as always.

[@Quizzes4U]

Thanks for giving it a go. I think you did great. The next quiz I'm working on now will probably be more to your liking. Have a great Easter. 👍😁

[@susanleitch8649]

@@Quizzes4U Sounds interesting! 😊

[@Quizzes4U]

I would say what it is, but given that other channels copy anything I make that's successful, I will leave it as a mystery until it comes out. 👍😁

[@susanleitch8649]

@@Quizzes4U Keep your secrets! 🤭❤️

[@passingby2522]

17:05 This is not dew, but guttation - recognizable by the droplets being only on the tip of the grass blade. It's the water that plant itself puts out when the soil moisture is too high

[@quintopia]

here's the issues i saw: 6) 45 degrees is only the best projectile angle when the muzzle velocity is low enough that the "uniform gravitational field" approximation is reasonably accurate. if you're going to state the first assumption (no air friction), state the other! 17) mixing red, green, and blue light in equal amounts will only produce light that our eyes perceive as white if you pick the correct wavelengths of those lights. for any 3 given wavelengths in those ranges, there is a mix that looks precisely white, but it might not be an equal one. (If I counted correctly, I got a 94, though a couple of those were admittedly 50/50 guesses.)

[@johnwausau64]

The coiled pipe shown in the PVC question, was actually HDPE or high density polyethylene...... for water service application. PVC is usually sold in straight lengths.

[@peapod8]

Many I guessed right with a lot of them using a process of elimination and word roots & association.

[@commodityjane]

The moon spins on its axis. Learning something new every day!

[@thesolarfutureenthusiast1102]

It does, once per orbit so we always see the same side.

[@jeffreyharrison3731]

I know the Earth spins on its axis, so I guessed that the moon does too.

[@scobra5941]

@@jeffreyharrison3731 As the moon is tidally locked to the Earth, doesn't that mean it spins around Earths axis and not its own?

[@Elriuhilu]

​@@scobra5941what you're describing is an orbit. The only way for only one side of the Moon to be visible from Earth is for the Moon to rotate around itself as it orbits the Earth, essentially turning its face towards Earth as it changes position.

[@johnwest7993]

@@scobra5941, it does both. The interesting part is that it holds 1 face to the Earth as it does so, meaning it rotates once on its axis as it goes around Earth once.

[@gunnargronvall9385]

I got 97% , I am an geologist with astronomy as a hobby .

[@gianmartinladia3488]

Is it worth it to be a geologist? Is it hard?

[@seancraven2361]

Great quiz, loved it, got three questions wrong and that made me google the shit to check and then learnt some new stuff. Great video, there should be more like it out there. I'm still pissed that got me. Didn't know CT scans where X-rays, knew Venus is hot bot not about volcanic activity and the radial nerve thing. Got the eye question only by assuming you ment relative to head.

[@CM-dw2xr]

Actually, the ostrich has the largest eyes of any land animal period. It's NOT the largest eye relative to body size, either ... the Tarsier takes that record. Take a guess the largest eyes of any animal on Earth ... it's about 5 times the size of the ostrich eye.

[@bipqrslef]

Great quiz, I got high 80s. I'm fortunate to have gone to a really good public school. It's nice that I have remembered so much.

[@megnotes7908]

I figured I wouldn’t do well, so I didn’t keep count. I’m blown away by how many I got right! And so many of my correct choices were from trusting my gut; forgotten knowledge stored in the convolutions of my brain, perhaps? Three correct answers were sheer dumb luck on stuff I’d never heard of before. Very fun quiz - I learned a lot! Thank you.

[@Quizzes4U]

Awesome

[@sharp-1000]

I missed 7 questions , your quizzes help me keep my mind working properly, I am 68 years old

[@Quizzes4U]

Me too. (Making them) 😁

[@milleijones2828]

72/100 Better than I thought I'd do! Science is not my best subject. Good quiz.

[@Quizzes4U]

Excellent. The next quiz will be something different. 😁

[@jemma50]

Excellent quiz, Ben. I got 76/100, which is a miracle of a little knowledge and a lot of good guesses. 😊 ♥

[@enscroggs]

97 of 100. I learned that ostriches have larger eyes than giraffes. I also learned that Venus has the most volcanoes, though, to my knowledge, only an extremely tiny fraction of that planet's surface has been seen. On Earth, vulcanism is connected to plate tectonics, a geological process Venus is said to lack.

[@nurselibby96]

Great science quiz, Ben. I'm best at anatomy and physiology. I did my best at the rest. Thanks for the challenge.

[@Quizzes4U]

Excellent!

[@RONALDO98-h1l]

98/100 is. Not bad I really appreciate you doing this stuff i hope u keep making it and teach more children's and adults.have a good day

[@merlinjackson4098]

Could not resist doing this test. I am 75 years old. I scored 71 %.

[@CM-dw2xr]

93/100 Pretty good quiz! Thanks :)

[@sameebah]

This popped up on the suggested videos, so I thought I would give it a go, sitting half-awake with a cup of strong coffee. Pleased to see that after 3 years of retirement I still managed to get into the 90's, and had I been properly awake there were a couple I would have answered correctly. A good range of topics, a couple of which had me reaching back to Biology lessons circa 1974 . . .

[@nicholasharvey1232]

I got 85/100. Some of these were actually a bit tricky.

[@platypi_otbs]

86/100 There were some easy ones thrown in, but I would that one as difficult

[@richardlynch5745]

100 correct..... disputing one about centripetal force being opposite of centrifugal...... there is no centrifugal force 26:49

[@brian1204]

Nice quiz. Covered a wide variety of sciences. I did find a couple of questions a bit ambiguous. Light does diffract, but I don’t think of that as “bending” around a corner. And I misunderstood the term “classical” states of matter, but thought it meant solid, liquid, gas, since colloidal was defined much later. By the “correct” answer of 4 I am assuming you meant air, water, earth, and fire? Anyway, enjoyed it and ended up with 89 correct.

[@rattywoof5259]

The fourth state is plasma.

[@G3NIUS-1NTELLIG3NT]

Thanks for making this extraordinary quiz!

[@yakinsea]

On Question 1 : A solid is the most dense and if one were to convert all the matter to energy, then the solid wins by far.

[@manoo422]

...Yes...but that wasnt the question!!

[@yakinsea]

@@manoo422 It seems to me that the question can be interpreted two different ways, and not enough information was given to get a single answer. A given volume of a substance (ie. a cubic centimeter) in each state will have the solid possessing by far the most energy. If that solid is heated to a liquid, and then on to a gas, then far more volume of the substance results, which in total holds more energy than the solid. That seems like the overly complex answer to a simple question.

[@jssamp4442]

Your first assumption is disproved by water ice. Ice floats in water because it is less dense. The energy contained in matter that is converted from mass to energy is the rest mass. But you are neglecting the thermal energy. Solids must absorb energy from the surroundings to melt into a liquid. Liquids boil into gasses when you put energy into them from the surroundings. The gas contains this added energy in the kinetic energy of it constituent molecules. This is why gas has more energy than solid or liquid.

[@manoo422]

@@yakinsea The question was simplistic, solids clearly contain less energy otherwise they would potentially be liquids or gases. There is no suggestion of reducing all the matter for each state into energy...

[@Graybear78]

80%. Excellent quiz. Enjoyed that.

[@Quizzes4U]

Great job!

[@DR713TX]

Great quiz! Was fun to follow along and test myself. My only advice would be that you can sometimes weed out the correct answer by your specific vocal inflections on particular answers. It’s probably something most people will never ever notice but I figured I would mention it 👍

[@fidelogos7098]

89/100. I think most of us who would even be interested in taking the test to begin with are probably science nerds anyway. BTW, I'm currently reading the book the movie Oppenheimer is based on. Excellent insight into quite a few of the giants of the time. Imagine what it would be like to have a beer with Bohr or Einstein or Schroedinger.

[@thomassimmer5186]

82. Excellent quiz, very diverse set of questions. Thank you!

[@Quizzes4U]

Glad you liked it!

[@princesslupi4136]

86 Correct. Great quiz, Ben. Thanks for sharing your hard work. Cheers!🥂

[@Quizzes4U]

My pleasure!

[@mayorb3366]

Great quiz!!! I didn't keep score, but probably made about 65%. I paused the video a few times to further investigate the answers. The last time I sat in a science class was ~40 years ago. Just subbed!

[@Quizzes4U]

Thanks 😁

[@kevinpayne9475]

96/100.. thanks Ben… good way to finish my weekend 😅

[@Quizzes4U]

Not bad, not bad at all. 👍😁

[@MrFlazz99]

92/100: shocked at second-guessing myself on a couple and completely guessed the answers to three questions incorrectly. 35 years since I left school and if anything I probably learned a couple more answers during that time - the Maslow question, for instance (which isn't science anyway - just organizational cobblers and/or psychobabble).

[@gcorriveau6864]

Not so bad for an old guy long out of science classes... but 'plasma' as a "classic state of matter" threw me. I enjoyed the variety and conciseness of the questions and the quick pace of the quiz. (from one who has discovered how hard it can be to compose good multiple choice questions!). Thanks for sharing.

[@breadfan7433]

Like last time, I was aiming for 90. Last time I had gotten 89. On the last question, I knew well that bananas are rich in potassium, but I thought, "well, potassium is not radioactive", so I picked radium even though it seemed weird. Completely forgot about isotopes... I knew I had about 10 wrong answers so far, and I thought "oh, no, please don't let it be 89 again". I anxiously counted the X's on my list, turns out I had 9 wrong answers so far, so I got exactly 90. I know this is silly. After all, we find multiples of 10 significant only because we have 10 fingers. And yet, I'm so happy right now. Thank you again, that was so much fun.

[@Quizzes4U]

Awesome. Glad to hear you did very well.

[@Unknownentityanon]

I'm happy for you, too! Now, aim higher!! Don't be afraid, you'll get it!!

[@valerievaughan6201]

64 correct. I guess not bad for just a high school education 😏

[@billharm6006]

94%. Learned a couple of things that I consider to be honest misses. I'm going to check on a couple of others.

[@cougar02000]

I only got 90/100, I was waiting for the hard questions but didn't really get any, but then again I'm something of a science geek, being interested in it all my life, and as such can't resist these quizzes.

[@kc5402]

Evidently ten of the questions *were* hard, at least for you.

[@CM-dw2xr]

88/100 and I'm delighted to report that I did not find a single question or answer to quibble about (my fav activity on most science quizzes). And it was fun to find some good questions that I honestly didn't know the answer! Thank you!!!

[@Quizzes4U]

Good to hear 😊

[@kenrieke5675]

good quiz. but, i stand firm on my answer to ' Does antimatter exist?'... i disagree with the current model. I also believe that 'dark matter' and 'dark energy' are simply the errors that keep occurring in the math. Personally, I think it's the inability to use infinity in calculations and the lengths theyve gone to circumvent that. All quantum calculations are done in a 'closed system' which occurs exactly nowhere in nature. Once we get an accurate unified field theory and a math that works for both micro and macro -cosoms, those notions will be discarded

[@susangratwick5327]

Thank you. I didn't and don't keep my score as it's usually not to be shared + science is not my best subject, but this time today I was able to get a lot right! So well done to you! Thank you. 😊

[@Quizzes4U]

Great job!

[@msdr01dmc53]

That was fun!😜Just happened upon your channel. Loved the quiz. To All who happen upon this digital footprint….. Have an Amazing Day World! 🎉-. Please try for “Do unto others, the same way you want to be treated.” With #Hope #Love #OnePeople #OneWorld #2024😎

[@DeactivatedCharcoal]

91 The expanding Gas seems wrong.

[@DaveKeenan1956]

I had virtually no science education at school, so I stopped after 10 questions and will come back when I'm less tired. Got the first question wrong, and want to think about that. Was correct on the next nine, but I'm old :-) Quizzes are fun!

[@schmerlski]

Most of us taking this quiz are science nerds. Thus, we mostly scored 88 and above. I know many lawyers and successful professionals in other fields who would be lucky to get 75 or 80. I got 92 and agree with the few errors pointed out below. Anyway, we are all knowledgeable or we wouldn't be here commenting. See ya round the internet.

[@Kinkle_Z]

Scored 83. Lots of tough questions for me. lol