1. do you feel the ends of the ruler pushing against your hands? 2. what will happen to the ruler as you release it?
3. what was stored as you bent the ruler using your left hand?
4. what will happen to the ruler as you take away your left hand quickly?

In what for do plants utilize nitrogen? why do they need nitrogen?

Nh3 +02-no + h20 is unbalanced what is the balanced equation

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.