Ch. 22 sec. 2 Answers. 1. What is smog made of?

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Presentation transcript:

Ch. 22 sec. 2 Answers

1. What is smog made of?

2. What does ozone in the stratosphere protect us from?

3. What are CFCs?

Chlorofluorocarbons

3. What are CFCs? Chlorofluorocarbons Were used as coolants in frigs and ACs, as well as propellants in spray cans and in the creation of plastic-foam products

3. What are CFCs? Chlorofluorocarbons

4. What could happen to humans with a 10 percent drop in ozone levels?

300,000 new cases of human skin cancer

5. What is a cause-and-effect relationship?

A change in one variable causes a change in another variable

6. What could happen to global temperatures with a doubling of atmospheric carbon dioxide?

Increase in average global temperatures of degrees Celsius (2-8 degrees Fahrenheit)

7. Increased acidity of soil and water due to acid precipitation causes what problems in the environment?

Disease or death in trees, fish, and other organisms

8. What is biological magnification?

Process in which chemicals become more concentrated in an organism the higher on a food chain that organism is.

9. What is ecosystem disruption?

The destruction or substantial change in the functioning of natural ecosystems

10. Define extinction.

Death of every member of the species

11. What is the biodiversity crisis?

Scientists estimate that 20 percent of Earth’s plant and animal species may become extinct in the next 50 years

12. What is a keystone species?

Species that affect many other species in a community

13. What is the Earth’s primary production and how much of it do human’s use?

The total energy stored (biomass) through photosynthesis by terrestrial organisms Humans use an estimated 10 to 55%

14. What does an ecological footprint account for?

Accounts for people’s use of food and natural resources, as well as people’s production of wastes and pollution

14. What does an ecological footprint account for? Accounts for people’s use of food and natural resources, as well as people’s production of wastes and pollution

15. What is sustainability?

The ability to meet human needs in such a way that a human population can survive indefinitely.