Answer the questions below in complete sentences. • In what layer does plasticity and convection occur?
• Which layer is thinnest under the oceans and thickest in the mountains?
• Which layer is made of solid iron?
• Which layer is the hottest? The coolest?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point