An animal that must obtain energy by eating

A plant that can use energy from the sun to make its own food

A large, naturally occurring area with similar year-round weather that supports similar kinds of living things.

Removal of forest

A barrier to hold back water

Abnormally low rainfall, leading to a shortage of water

The salty tides that flow into a coastal area

A dense growth of shrubs or small trees, such as the hills surrounding La Habra

Vast, treeless plains of the arctic regions

An area in which the vegetation consists largely of grasses; prairie

a forest with primarily pine trees that keep their needles all year

A forest with trees that shed leaves in the fall and grow new leaves in spring.