Unit 2 Test Watersheds

The streams and smaller rivers that feed into a main river are called

• divide

• tributaries

• watershed

• estuary

The land area that supplies water to a river system is called a

• divide

• tributaries

• watershed

• estuary

Because watersheds can cover a large area, pollution in watersheds can affect vast numbers of living organisms.

• True

• False

One watershed is separated from another by a ridge of land called a

• Divide

• tributaries

• watershed

• estuary

A lake that stores water for human use is called a

• watershed

• estuary

• divide

• reservoir

As lake organisms die, bacteria break down the bodies and release nutrients into the water. Over time nutrients build up in the lake in the process known as

• eutrophication

• transpiration

• bacterial formation

• photosynthesis

Though it entrophication occurs naturally, human activities can also cause or increase it.

• True

• False

A river and all the streams and smaller rivers that flow into it together make up a

• watershed

• tributary

• river system

• estuary

A watershed is sometimes referred to as a drainage basin

• True

• False

Compared to lakes, ponds are usually

• larger

• deeper

• shadier

• shallower