9781422275184

• chemical • elastic (stored mechanical energy) • nuclear • gravitational

There are two types of energy: Kinetic (working) energy is energy that is in motion. There are five types of kinetic energy: thermal, radiant, motion, electrical, and auditory. Stored (potential) energy is energy that can be stored and used when needed. There are four types of potential energy: chemical, elastic, nuclear, and gravitational.

DID YOU KNOW?

Fifty-nine percent of teens surveyed by the National Environmental Education Foundation in 2017 felt that the environment was in bad shape, but that it could be saved. Forty-five percent believed that the health of the environment would get worse in the future. Fifty-nine percent of teens worried about the state of the environment.

NONRENEWABLE AND RENEWABLE ENERGY There are two sources of energy on earth: nonrenewable and renewable. Nonrenewable energy sources are those that cannot be replaced once they are used. Examples include fossil fuels such as coal, oil, and natural gas. Fossil fuels were formed millions of years ago by natural processes in the earth.

12 COOL CAREERS IN SCIENCE: RENEWABLE ENERGY WORKERS