2- Surface/ Ground 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.
• Theses chemicals cannot be purchased in large bulk.
• 
  These chemicals are expensive to produce.
  
• Storage space for these chemicals is limited.

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 down towards a watershed

A ___________ is smaller stream or river that "feeds" a larger stream or river.

• rill
• gully
• watershed
• tributary

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

• rill
• gully
• stream channel
• watershed

Where is water most likely to become contaminated?

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

Where is used water treated and cleaned?

• A filter
• A power plant
• A water treatment plant
• A dam

A lake that stores water for human use is called a ____________.

• dam
• oxbow lake
• reservoir
• crater lake

The illustration provided shows a river and four cities on that river. When the water from the river was sampled at location X, it was determined to be polluted with various chemicals. What would be the most likely source for this pollution?

• City 1 and City 2
• City 2 and City 3
• City 3 and City 4
• City 1 and City 4

What is a river?

• A large body of freshwater
• A saltwater inlet of the ocean
• A natural large stream of flowing freshwater
• An underground waterway