Watersheds

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.

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.

All water below the surface of land is called__________.

• water table

• watershed

• groundwater

• runoff

The process where water or irrigation runs over land and seeps into the ground, or flows into streams or oceans.

• water cycle

• runoff

• precipitation

• evaporation

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

• 
  Available space for crops
• Local pond life
• Rainfall rates
• Direction of river flow

What is a watershed?

• Land that collects and channels water froma small body of water to a larger body of water
• the shape of the land determined by elevation
• A natural stream of water of considerable  volume
• a river and all its tributaries

Why is gravity a factor in watersheds? 

• it causes the water to flow away from a watershed
• it causes the water to flow towards a watershed

Define tributaries

• small rivers or streams that flow into a large river or stream
• a natural stream of water of considerable volume
• precipitation that flows over the land to streams
• a continuous ridge that separates a watershed

The health of an ecosystem is directly related to the:

• Air quality
• Amount of animals in the area
• Water quality
• Amount of food in the area