Water Unit Review

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

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

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 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?

• 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.

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

• dam
• oxbow lake
• reservoir
• crater lake

The build up of nutrients in a lake is a process called ________________.

• eutrophication
• volcanic eruption
• algae buildup
• pond death

Which human activity can speed up the process of eutrophication?

• Building cities
• Nuclear power plants
• Deforestation
• Farming

Bacteria release which nutrients into lakes as they decompose dead organisms?

• oxygen and nitrogen
• nitrogen and carbon
• carbon and phosphorous
• phosphorous and nitrogen

Which of the following is true regarding freshwater availability?

• Over 50% is available belowground
• Over 75% is available in surface water bodies
• Over 75% is unavailable in ice and glaciers
• Over 75% is unavailable in atmospheric water

What happens when adjacent saltwater infiltrates a freshwater resource due to rapid pumping?

• Cone of despression
• Saltwater intrusion
• Oligotrophic lake transformation
• Impermeable surfaces