Matter in Our Surroundings Class 9 Science (Part-1) | CBSE Class 9 Exams | BYJU'S- Class 9 & 10

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Hi am

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Hi mam

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hii mam

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Hi ma'am

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How to join this class mam Please reply

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Who is in 9th grade rn (2024-2025)? also 6:16 chapter starts

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Me!!

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Me!!

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me frfr

[@indusinha3745]

Thankyou Kriti ma'am for explaning so well! ❤

[@jananiepremkumar7191]

a. The particles of air are loosely packed , so our hand can easily get through in it by the gap, whereas in wood particles are tightly packed , there is no gap in between them , so our hand can not move in the plan of wood b. Because when incense stick is light , it is having a high temperature, so when there is high temperature kinetic energy is also high , so it is easy for particles to get in, so diffusion is faster and fragrance spreads all over room quickly

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6:16 The topic starting

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Like how is now a 9th class student

[@gyandhartripathi8266]

Mam ki Language bahut acchi hai Hindi English mix aise padhne mein jyada maja aata hai 😊

[@aditidutta412]

Homework answer: A) As the particles of air are freely movable and have all the characteristics of gases but are the same in a solid block of wood the particles are closely packed and are not easy to break. Karate experts could break it as they apply more force to it and this is the reason y we could move our hands freely in the air and could not do the same in solid. B) when an incense stick is lighted in the corner of our room its fragrance spread quickly in the entire room because when the incense stick is being heated then kinetic energy produces which helps the fragrance of incense stick mix up with the air molecules and the fragrance our room....... Thank you ma'am session was amazing 🌼🌼🌼

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[@videocreater3500]

Nice

[@videocreater3500]

Chemistry is nice

[@rajatyadav9038]

Homework question: A. We can easily move our hand in air because in air there is less force of attraction between the particles and plan wood has more force of attraction as we know it is a solid, it has more attraction compare to liquid and gas. B. Incense stick is fragrance spreads quickly in the entire room because of its particles, there particles have less force of attraction and freely space between them.

[@BYJUSClass910]

Great Rajat Yadav, Keep Watching and Keep Learning👍🏻

[@SunitaDevi-s9x9o]

Hi mam iam Kavya

[@studyalltime8920]

Home Work 1.We can move our hand through air because it has lot of space. But on a plan wood it has attraction in it and it is a plan of wood we need a karate expert because they had trained there self so there hand will be strong. 2. When an increase stick is lighted in the corner of a room, it's fragrance spreads quickly in the entire room because of kinetic energy by which the particals move fast and the diffusion increase. Thank you mam for teach good 🥰🥰🥰🥰we love it.

[@padmajasanku5585]

Hemantth

[@educatedmindsindia5284]

(a) We can easily move our hand in air but do not in plan of wood because In air (gas ), particles are far so that we can easily move our hand and In plan of wood (Solid) particles are not far so that we cannot move our hand. b) because of diffusion

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The class starts at 6:16

[@yuvrajgiri2493]

{Name - Ayush Yuvraj Giri } A) Because of the difference between the amount of space between the particles of air and wood.Air particles have more space between them and wooden plank has very less space between them. B) The Fragrance of incense stick spreads quickly because the particles move continuously in all directions.

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Yes, I had subscribed it already.

[@Maniyahere]

HOMEWORK A. It's because the wood is solid the particles and way to much attracted to each other so that's why it's difficult for us to break it and that'why we need a karate teacher who can put force. B. Incense of stick us getting heated so the kinetic energy gets faster due that there is a fast diffusion between particles so that is why we can smell it from the another corner of the room.

[@thearchitchoudhary]

Answers to today's homework : ) (a) Due to increase in intermolecular force of attraction in the solids ( i.e. wood ) than in gases , we need a karate expert to move our hand . (B) Due to continues movement in the molecules of the air the particles of incense stick ( when lightened ) also spread apart . Thus , we can get the fragrance in the corner of the room .

[@BYJUSClass910]

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[@Somthing_in]

Good explanation 😀🤗 😀😀

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Shape and size

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Fine mam

[@neelukirecipe4043]

Super amazing explanation 👍👏

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Hello Neelu, Keep Watching for more amazing sessions😊

[@ilishasrivastava6166]

Emotions, light, sound, force, hotness and cold, friction, waves, senses, phenomena, electricity, smell,energy etc are not matter (Smell of a particular substance is matter since it carries the particles of that substance) Even though light is made up of photons it is not matter since photons are energy packets that travel altogether in so high speed that we see light. So it’s an energy not matter.😊

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[@vinodpunjabi3423]

A) because particles of air are apart from each other so we can easily move our hand freely but in solids particles have less space comparitivily to liquid and high intermolecular force of attraction so we can not move our hand freely in solids B) particles of air are apart from each other so particles of incense stick diffused easily in air hence we get fragrance of stick

[@BYJUSClass910]

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[@sadafshaikh8656]

Homework Question:- A) The particles of air are loosley packed while the particles in wood are tightly packed as they are solids B) The particles of matter are continuously moving .They have high kinetic energy and is diffused faster.

[@SaaiTarunRocks]

a)Air this matter may exist in the state of gaseous state,gas has very less force of attraction so it will be easy to move our hands but in the case of wood its state of matter is solid ,they have very high force of attraction so it will be tough to move your hand b)When an incense stick is ligjted in the corner of a room ,its fragrance will spread quickly in the entire room because particles of matter will continuously, due to the presence of high kinetic energy the particles will move very fast

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❤samiksha

[@Ashutosh4219]

Every thing that has mass and volume is called matter

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[@gbhargavi7925]

a)The particles more in solid like a plan of wood that makes it hard to move our hand than the air. b) Diffusion.

[@aparnajha4782]

Anything that has mass and occupies space is called matter

[@samikshapalle6496]

because the solid diffuse at very low rate. but if the temperature of solid is increase then the rate of diffusion of solid into air increase due to kinetic energy

[@BYJUSClass910]

Hey Samiksha, Amazing! Keep Watching👍

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👍👍

[@sandeepdhaker1467]

I love chemistry ☺️

[@mukeshkesarwani799]

Yes mam I shall try it to for sure 😀😃🥰

[@satyaprakash5058]

👍, very nice explanation mam, i understood each and every concept 💚❤️💚❤️💚❤️

[@DeepakPatel-609]

1)Due to the difference in the amount of space between the particles , we can easily move our hand in air but to do the same through a solid block of wood we need a karate expert 2)The fragrance of lit incense stick spreads quickly in the room because the particles of matter are continuously moving in all directions.

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[@tabassumk3601]

Hello mam this session is soo helpful I'm enjoying it thanks a lot mam😊

[@jayasreek6043]

answer for a we can move our hand easily in air because the air molecules are freely packed whereas in wood , the molecules are closely packed answer for b when we burn a incense stick it fragrance spreads everywhere because the molecules presented in the stick combines with the air molecules

[@aparnajha4782]

Anything that has mass and occupies some space is called matter

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U learn so well

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It's the greatest chemistry class I have ever attended, just amazing 🤩

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[@dakshsiddhu2849]

Homework 1. Because the intermolecule bond is strong in solids as compare to air 2. Because It's particles are moving Ma'am can you please explain me kinetic energy once again.

[@prasanshasingh1116]

Mam the ans is for 1) the intermolecular force of attraction between air particles is very low thats we can easily move our hand but in wood the intermolecular force of attraction is very high that's why we can not move our hand through it. 2) it's fragrance spread quickly into the room due the process called diffusion . In which the particle of the stick mixup with the particals of air. Thanks to teach like this way...

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[@Kaurnagi2010]

home work Sugar is a solid and Force of attraction is the most. Water is a liquid and Force of attraction is less than solid but more than gas. Oxygen is a gas and Force of attraction between the molecules is the least.

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We learn new things with byjus

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Feeling, thought, expression etc

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I loved byju's classes and I understood the concept that mam has taught in this video 😍😍

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[@vaidehibhaskar7asn863]

The salt occupies inter molecular space ........

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Shruti I will try

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mam pls do upload for class 9 social

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Sounds is matter?

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No it's a vibration and we can't see it

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Door

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I love learning N my fav subject Science

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Mam you are very beautiful

[@mansi8034]

Ans. (a) In air particles of matter are very far, but in a plan wood particles of matter are very close. So, that is why we can easily move our hand in air but not in wood Ans. (b) because when temperature 🌡️increases, kinetic energy of particles increases the diffusion

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Books ,copies,dress, table,fan etc

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thanks miss this helped me a lot to understand earlier idid not understand but now crystal clear

[@m.hrithika6074]

Answers to today's homework: a) Due to increase in intermolecular force of attraction in the solids(i.e. wood) than in gases, we need a karate expert to move our hand. b) Due to continues movement in the molecules of the air the particles of incense stick (when lightened ) also spread apart. Thus, we can get the fragrance in corner of the room.

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Mam I like your teaching.

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Yes in Sundays

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I like science and chemistry

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My favourite subject biology, chemistry, physics,math also

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What does it mean that matter is continuous ?

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Will the part 2 also come of this chapter??

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Mam

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Fine

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I can see water bottle , juice with glass, refrigerator

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Because in the wood the force of attraction is maximum but in air the force of attraction is minimum

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Feeling, thought, expression

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Like ur teaching mam ❤😊

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Amazing 👍

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Sciene but biology fav

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Thanku mam I am malavika from Kerala I understood everything can u tell me when is physics class chapter is motion for class 9 CBSE 🤗and your class is awesome

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Hey, Session on Motion Chapter is already done by Saurabh Sir, Please check the below link for the Session! kzbin.info/www/bejne/hqClZ3acppVkh9k

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@@BYJUSClass910 ok mam and ur class is awesome I got full mark in school class test

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THANK U FOR THIS AWESOME VIDEO

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Juice bottle, milk, water bottle, fridge, shelves, oil, pot, spoon, microwave, etc...

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Hy mam

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Pen

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Thank-you much mam do this videos continuously and it is helping us very much mam again thanks for the support mam 😊

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Love, emotions, respect

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6:20 from here the chapter starts...

[@vartikayadav1238]

Today's homework answer :- a) it is because in air the particles are not attracted or close to each other as in the solids . b) the particles of vapours of incense stick is mixed or diffuse with air particles had hence the fragrance spreads in room.

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[@Dipanshu--khanna]

All are matter

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EVEN IN 2024 THIS HELPS A LOTTTTT!!!!!

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Really your teaching is too good l understood well thank you so much mam

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Most welcome 😊 Please subscribe for more Interesting classes!

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Hemanth naga sai

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Yes

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👍

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6:18 Session starts

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Mam will you explain in English,telugu

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Thanks ma'am for this session 😌❤

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Very good lesson i love it but please can you do the quiz on it

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Hey Advik, we are planning to make that session, Stay tune for more😊

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Hiii mam.. I'm really enjoying this video

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Love byjus I have taken byjus premium as well and it is really good 👍🏻👍🏻👍🏻👍🏻

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Thanks a lot, Stay tuned to our channel for Updates on upcoming Amazing Sessions and Interesting Topics!🤗

[@aparnajha4782]

Cold water

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I have doubt that anything which we can feel is matter or not ?

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Chair and book

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Since is so exploring and mistry

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Very cute smile and face

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Thanks you ma'am My favourite subject science but taff chapter I can't samach

[@Education-network...339]

Home work Explain the following: a.ans:-We can easily move our hand in air but to do the same through a plank of wood,we need a karate expert because the particles of air have vacant spaces between them,so the force of attraction between the particles is very less while ,In a plank of wood,which is solid,the particles are closely packed together and have a strong interparticle force of attraction between them, this makes them rigid and hard to break . b.ans:-When an incense stick is lighted in the corner of a room,its fragrance spreads quickly in the entire room due to diffusion of the particles of the gas of that fragrance in air.

[@BYJUSClass910]

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[@pandey1456]

all clear

[@supriyagr269]

👍👍👍👍👍👍

[@laxmishankaryadav3818]

I also want

[@laxmishankaryadav3818]

Hi , teacher please reply

[@theanchalsharma]

I like byjus classes

[@Ashutosh4219]

All of them are matter

[@BYJUSClass910]

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