Words to know Write the letter of the definition next to the matching word as you work through
the lesson. You may use the glossary to help you.
fossil fuel
A. the movement of nitrogen through the living
and nonliving parts of the environment
nitrogen cycle
B. the movement of carbon through the living
and nonliving parts of the environment
carbon cycle
C. the change of state from a gas to a liquid
water cycle
D. a fuel formed from the remains of organisms
condensation
E the movement of water through the living
and nonliving parts of the environment