Lab: Effects of Human Activity on Freshwater Resources

Question 1

How do acids and bases affect the quality of freshwater sources?

Revolt · Accepted Answer

Acids lower the pH of freshwater and bases raise the pH of freshwater.

Question 2

greater than 6.65equal to 6.65✔ less than 6.65

Revolt · Accepted Answer

less than 6.65

Question 3

baking soda✔ pesticidesoap

Revolt · Accepted Answer

pesticide; Selection 1: pesticide; Selection 2: less than 6.65

Question 4

Think about how acids and bases would affect the water quality in the two lakes.Which set of pH data would you expect to see based on your observations?

Revolt · Accepted Answer

Lake A: pH = 8.3; Lake B: pH = 3.7

Question 5

Which statements describe freshwater sources? Check all that apply.Rainwater can replace or replenish freshwater sources.Precipitation, such as rainwater, is the source of freshwater on Earth.When the amount of surface freshwater increases, so does the amount of groundwater.Human activity, such as taking a bath, may change the quality of a freshwater resource.Pollution in lakes does not affect groundwater because the ground acts as a barrier or filter.

Revolt · Accepted Answer

Rainwater can replace or replenish freshwater sources.; Precipitation, such as rainwater, is the source of freshwater on Earth.; When the amount of surface freshwater increases, so does the amount of groundwater.; Human activity, such as taking a bath, may change the quality of a freshwater resource.

Question 6

Which sources of nutrient pollution are mentioned and shown in the video? Check all that apply.

Revolt · Accepted Answer

farms; laundry detergents; pet wastes; water treatment plants

Question 7

Which statements describe turbidity? Check all that apply.

Revolt · Accepted Answer

Turbidity is a measure of water clarity.; Turbidity may be caused by sediments.; Turbidity may be a result of human activities.

Question 8

Which human activities would most likely increase turbidity? Check all that apply.

Revolt · Accepted Answer

cutting down trees; building roads in mountains; constructing buildings; removing sediments from sidewalks using water

Question 9

What can people do to lessen the effect of energy production on the pH of freshwater sources? Check all that apply.

Revolt · Accepted Answer

produce energy using water power; use electricity or energy-saving products; create technology to capture sulfur dioxide; use petroleum instead of coal to produce electricity

Lab: Effects of Human Activity on Freshwater Resources Answers

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