Watershed

Why are watersheds important?

• They provide habitats for aquatic life

• Without them our land would be constantly flooded

• Prevents soil erosion

• Used for generating hydroelectric power.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which is NOT one of Canada's Watersheds?

• The Arctic

• The Pacific

• James Bay

• Hudson Bay

What could be an easy way to prevent non-point source pollution?

• let someone else wash your car

• keep businesses and industries from disposing of hazardous chemicals

• farmers can make sure that waste treatment tanks do not spill or leak into the groundwater

• don't use too much fertilizer on your yard- when it rains, there won't be any excess to run off into a storm drain

Tags

NGSS.MS-ESS3-3

A community is concerned that its river has become polluted. Analysis of water samples shows small amounts of over 20 different chemicals. Which of the following is the most likely cause for the increase in pollution?

• the increase is due to agricultural point source pollution

• the increase is due to industrial point source pollution

• the increase is due to residential non-point source pollution

• it is impossible to determine

The image shows various stages in the water cycle. During which stage does water flow back towards the sea as runoff?

• W

• X

• Y

• Z

Tags

NGSS.MS-ESS2-4

A student’s model of an area near a city depicts many activities that affect the quality of the water in the area. How does the agricultural activity most likely affect the surface water of the area?

• Crops absorb pure water from soil, causing the remaining water to contain more salt.

• Crops reduce erosion, increasing the amount of soil entering the river.

• Excess crop fertilizer is carried by runoff into the river, causing excess growth of water plants.

• Excess crop material accumulates on the riverbanks, slowing the movement of the river water

Tags

NGSS.MS-ESS3-4

A student drew the model below to represent a part of a watershed and some human activities that affect the watershed. How do the industrial, agricultural, and residential activities of humans most likely affect the groundwater in the area?

• Pollutants from the activities percolate through the soil and enter the water table.

• The activities prevent most of the water from evaporating into the atmosphere.

• The activities replace the groundwater used.

• All of the above

Tags

NGSS.MS-ESS3-4

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

• causing rapid algal growth that decrease oxygen levels and choke aquatic life.

• clogging narrow streams and preventing water from flowing properly.

• increasing the amount of nutrients available to fish in lakes and streams.

• raising the water level in nearby rivers to levels leading to flooding.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

When runoff crosses the land, it picks up fertilizers that have been used on crops and lawns. These contaminants will eventually enter a lake, river or stream, which may lead to -

• the earth’s surface to sink.

• the water in an aquifer to drop.

• harmful rapid growth of algae.

• cleaner water for drinking and bathing.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

What is a watershed?

• A) A region of land where all the water drains into a common waterway

• B) A type of water storage facility

• C) A method of water purification

• D) A type of irrigation system

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-1