ECOSYSTEMS

An ____________ includes all the living and nonliving things in a given area. 

• ecosystem

• apple

• eraser

Living organisms like plants and animals are __________________.

• Abiotic factors

• biotic factors

Nonliving elements like soil and water are __________________.

• Abiotic factors

• biotic factors

Terrestrial ecosystems are on _____________.

• water

• land

• air

______________ are the driest places in the world. 

• Oceans

• Forests

• Deserts

A ________ is a path that water takes toward the ocean.

• ocean

• lake

• river

An _________ is a huge body of saltwater.

• river

• ocean

• lake

There are two main types of aquatic ecosystems.

• freshwater and saltwater

• rain and river

• ocean and lake