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.

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

pollution is.....................................................................

• chemicals or other things that have poisonous effects on our enviorment

• chemicals or other things that have posotive on our enviorment

• chemicals that flow to our water in run off

Which of the following can pollute water?

• Moss
• Pesticides
• Seaweed
• Fish

The water that fills lakes and rivers

• groundwater
• surface water
• water table
• saturated zone

Water stored  in cracks and pores below the Earth's surface is called:

• Groundwater
• Bogs
• Water in the ground
• surface water

Pollution has ___________

• a negative human impact
• positive human impact
• humans have no impact 

All bodies of fresh water, salt water, ice, and snow that are found above ground

• Groundwater

• Surface water

• Runoff

• Swimming pool

What is the water that fills the cracks and spaces in underground soil and rock layers called?

• Groundwater
• Water Table
• Precipitation
• Snow

Bacteria is one of the main pollutants of concern in our watershed. What is the source of most pathogenic (harmful) bacteria that gets into our waters?

• Animal waste products or human sewage

• Sediment or dirt

• Trash

• Fertilizers