Q: Which of the following forms of energy is released or absorbed in most chemical reactions?
A: heat energy

Q: Which human organ system exchanges gases with the environment?
A: respiratory

Q: A wet towel will dry when it is left in the Sun. Which process occurs to make this happen?
A: evaporation

Q: Which best explains the importance of nitrogen in the cycling of energy and matter?
A:
Nitrogen increases protein production in plants.