Lab: Environmental Changes in a Watershed

Question 1

Which examples represent abiotic factors affecting biotic factors? Check all that apply.Sediment builds up in a riverbed, slowing the river’s speed.Ash from a volcanic eruption kills new plant growth.A hungry raccoon consumes a freshwater clam.Warm water from a nuclear power plant causes overgrowth of algae.A river floods and deposits tree pollen along its banks.

Revolt · Accepted Answer

Ash from a volcanic eruption kills new plant growth.; Warm water from a nuclear power plant causes overgrowth of algae.; A river floods and deposits tree pollen along its banks.

Question 2

Pollution from a single, identifiable source is called source pollution.

Revolt · Accepted Answer

point

Question 3

Pollution that is difficult to link to a particular origin is called source pollution.

Revolt · Accepted Answer

nonpoint

Question 4

How could the dam affect the resources of the local watershed? Check all that apply.

Revolt · Accepted Answer

Fish would not be able to migrate up the river to reproduce.; Sediment carried by the flowing river would get trapped.; Birds that depend on fish may go hungry.

Question 5

What would happen to the population of mice if grasses were lost to a forest fire?

Revolt · Accepted Answer

It would decrease because grass is the mice’s main source of food.

Question 6

The land that supplies water to a river system is called a .

Revolt · Accepted Answer

watershed

Lab: Environmental Changes in a Watershed Answers

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