1. explain why liquid water is required in order for life to exist.

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

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

How is the carbon cycle related to global warming ?