Was Jesus always the Son of God even before He came to earth?

What does it mean that Jesus is the son of God? Has he always been the Son of God? What is his role in the trinity?
Bible references: Luke 3, John 5, John 20
Levi Secord is pastor of Christian Life and Growth at Riverview Baptist Church in West Saint Paul, Minnesota.
Ask Anything is a video series of questions and answers about Christian faith, belief and practice asked by real people and answered by the pastors of Riverview Baptist Church.
The mission of Riverview Baptist Church is: to bring people to faith in Christ; to bring Christians to maturity in Christ; to worship and live to bring praise to Christ; to support locally and globally the work of Christ. We are a member of the North American Baptist conference.
Find out more about us and our worship times at www.riverviewb.... Contact us at 651-457-3831 or email [e-mail].
Riverview Baptist Church
14 E. Moreland Ave
West St. Paul, MN 55119