Ch. 5 Human Impact

What effect does ozone near Earth's surface have on the human body?

• It increases lung function.

• It increases throat irritation.

• It reduces breathing problems.

• It reduces skin cancer.

Why has the use of CFCs been phased out?

• They cause acid rain.

• They produce smog.

• They destroy ozone molecules.

• They impact the nitrogen cycle.

Which forms when chemical reactions combine pollution with sunlight?

• smog

• CFCs

• particulate matter

• acid precipitation

The remains of dead organisms that over time change into coal, gas, and oil are called

• fossil fuels

• CFCs

• greenhouse gases

• acid precipitation

A gas released from vehicles and industrial processes that are considered poisonous for humans.

• CFCs

• nitrogen dioxide

• carbon monoxide

• ozone

Which uses the most water in the US?

• factories

• farms

• households

• power plants

Which source of water pollution would be hardest to trace and control?

• runoff from a city

• runoff from a mine

• an oil leak from an ocean tanker

• water from a factory discharge pipe

What is the main purpose of the Safe Drinking Water Act

• to ban point-source pollution

• to clean up the Great Lakes

• to regulate landfills

• to protect drinking water supplies

Which is an example of point-source pollution?

• An oil tanker spilling oil into a river.

• Dirt washing away from a construction site.

• Fertilizer run-off from farm land.

• Run-off from a city.

Which has a negative impact on land?

• composting

• reclamation

• reforestation

• mining