Quiz: Watersheds and Pollution

Wetlands are important because they  __________ water like a sponge.

• drink
• love
• filter or clean

In a watershed, what creates the boundary?

• Tributaries
• Highest land surrounding the basin
• Bayous
• Lowest land surrounding the basin

Water that collects in cracks and pores in underground soil and rock layers.

• surface water
• ground water
• aquifer
• watershed

The flow of water from rain, snow melt, or other sources over land.

• runoff
• drainage
• watersheds
• aquifer

Humans affect watersheds and wetlands by :

• polluting
• destroying
• overbuilding
• all of the above

A ___________________ is the area of land that collects runoff and channels it into a main river, and eventually into the ocean.

• rill

• gully

• stream channel

• watershed

Which of the following is an example of how humans can reduce the rate of natural erosion?

• plow cropland
• clear land of trees to build
• plant trees
• logging

Where is water most likely to become contaminated?

• forest
• near a cattle farm
• near a dam
• at the bottom of the ocean

What is erosion?

• When rocks and sand are moved by water
• When water gets contaminated
• When plants grow next to a river
• When rocks are broken apart by water

The use of pesticides and fertilizers must be carefully monitored

because of the effect they can have on the environment.

Which of the following is a possible negative effect of the use

of these chemicals on the environment?

• Runoff carries these chemicals into lakes and streams, this can then cause algal bloom.

• Theses chemicals cannot be purchased in large bulk.

• These chemicals are expensive to produce.

• Storage space for these chemicals is limited.