earth science vocab ch 4

Question 1

are those that are always being replaced and will not run out.

Answer 1

renewable resources

Question 2

are those that cannot be replaced quickly enough to keep from running out.

Answer 2

nonrenewable resources

Question 3

is the presence of substances that are harmful to the environment or to living things.

Answer 3

pollution

Question 4

is any fuel that formed from the remains of plants and animals that lived millions of years ago.

Answer 4

fossil fuel

Question 5

is electricity produced by the energy in moving water.

Answer 5

hydroelectric power

Question 6

is plant material and animal waste used as fuel.

Answer 6

biomass