Va Watershed & Ground

Identify each abiotic factor that can affect a watershed. 

• geology
• landforms
• soil
• all of the above

The land area that drains a particular set of streams and rivers is called  

• an acre
  
• a drainage hectare 
• a woodland
  
• watershed 

A student was listing all the abiotic elements she saw in the environment. She listed rocks, soil, trees, water, and air. Which item on her list was NOT abiotic? 

• rocks
• trees
• water
• air

The health of an ecosystem is directly related to — 

• water quality 
• biotic factors 
• animal life
  
• air movement 

Of the following choices, which watershed in Virginia is the largest? 

• New
• Rappahannock
• Shenandoah-Potomac
• James

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

What is Point Source Pollution (PSP) ?

• When you cannot trace the direct source of pollution
• When you can trace the point of the source - "pipe to source"

When fertilizers enter surface water, they cause problems in 
the watershed by -

• increasing the amount of nutrients available to fish in lakes and streams.
• 
  clogging narrow streams and preventing water from flowing properly.
• raising the water level in nearby rivers to levels leading to flooding.
• causing rapid algal growth that decrease oxygen levels and choke aquatic life.