An Olympian ski jumper uses friction to stop. This is an example of what type of
energy transformation.

The image shows embryos of three vertebrate classes

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is 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

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?