Embed Size (px)
Citation preview
Ch. 22 sec. 2 Answers
1. What is smog made of?
1. What is smog made of?
2. What does ozone in the stratosphere protect us from?
2. What does ozone in the stratosphere protect us from?
3. What are CFCs?
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?
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?
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?
6. What could happen to global temperatures with a doubling of atmospheric carbon dioxide?
• Increase in average global temperatures of 1-4.5 degrees Celsius (2-8 degrees Fahrenheit)
7. Increased acidity of soil and water due to acid precipitation causes what problems in the
environment?
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?
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?
9. What is ecosystem disruption?
• The destruction or substantial change in the functioning of natural ecosystems
10. Define extinction.
10. Define extinction.
• Death of every member of the species
11. What is the biodiversity crisis?
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?
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?
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?
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?
15. What is sustainability?
• The ability to meet human needs in such a way that a human population can survive indefinitely.
