Teaching Slide, Watershed

Look closely at the map of the watershed below. If water enters the watershed at the top of the mountain where the arrow is pointing, at which point will it stop draining?

• Point A

• Point B

• Point C

• Point D

Where are you most likely to find a watershed?

• In a lake

• On a mountain top

• At the bottom of a valley

• Everywhere

What definition BEST describes a watershed?

• An area where water infiltrates the soil

• An area where aquatic plants and animals thrive

• An area where snow melts and changes into liquid water

• An area that collects precipitation and drains it to the lowest point

The boundaries of a watershed are determined by ___________

• Elevation

• Soil type

• The amount of water that flows

• The kinds of organisms found in the area

Which of the following human activities is LEAST likely to affect watersheds?

• Flying in an airplane

• Cutting down trees

• Fertilizing lawns

• Reading a book

Which statement about water pollution is TRUE?

• Pollution only affects surface water.

• Pollution cannot be dissolved in water.

• Pollution affects both surface and groundwater.

• Pollution cannot travel through soil to groundwater.

Which of the following models BEST represents how water flows in a watershed?

• A

• B

• C

• D

Pollutants from a factory that enter the water in a watershed will have a negative effect on which of the following?

• Local pond life

• Rainfall rates

• Direction of river flow

• Available space for crops

A neighborhood in a small Texas town had to be evacuated because the houses were sinking due to a problem in the aquifer. What is the most likely cause of this problem?

• Heavy rains caused oversaturation of soil foundations.

• Overbuilding in the area polluted the ground water.

• Runoff from fertilized land created a dead zone.

• Excessive removal of water weakened the ground.

The use of pesticides and fertilizers is 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 chemical on the environment?

• These chemicals are expensive to produce.

• Runoff carries these chemicals into lakes and streams.

• Storage space for these chemicals is limited.

• Theses chemicals cannot be purchased in large bulk.