when you breathe in air you bring oxygen into your lungs and blow out. A. Carbon dioxide B. oxygen C. carbon monoxide D. hydrogen

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?

20 the compound al(nh3)2 has atoms of nitrogen.

Which label identifies the part of the atp molecule that changes when energy is released in the cells of all living things