Question

1. why is smog a more serious problem in the southern united states than in the northern united states?

a. global warming is worse in the southern united states.
b. acid rain is worse in the southern united states.
c. sunlight is more abundant in the southern united states.
d. there are more pollutants in the northern united states.

1. which of the following is correct?

a. all ozone in the atmosphere is helpful.
b. all ozone in the atmosphere is harmful.
c. ozone in the stratosphere is helpful but ground - level ozone is harmful.
d. ozone in the stratosphere is harmful but ground - level ozone is helpful.

1. what is one of the main causes of air pollution?

a. habitat destruction
b. aerosol sprays
c. nuclear power plants
d. runoff

1. what impact does uv radiation have on humans?

a. cataracts
b. lung cancer
c. skin cancer
d. a & c are correct
e. b & c are correct

1. what is one of the main causes of water pollution?

a. habitat destruction
b. aerosol sprays
c. nuclear power plants
d. runoff

1. algae is a photosynthetic organism that produces 70% of the atmospheric oxygen. why are algal blooms bad?

a. algal blooms use up a lot of oxygen and block incoming sunlight to other organisms.
b. algal blooms produce too much oxygen and suffocate organisms with too much oxygen.
c. algal blooms release carbon dioxide to surrounding organisms.
d. algal blooms are very beneficial to the environment.

Explanation:

1. Smog formation requires sunlight to trigger chemical reactions between pollutants; the southern U.S. has more sunlight.
2. Stratospheric ozone protects from UV radiation (helpful), while ground-level ozone is a smog component (harmful).
3. Aerosol sprays release pollutants like CFCs or volatile organic compounds contributing to air pollution.
4. UV radiation damages eye lenses (cataracts) and skin DNA (skin cancer).
5. Runoff carries fertilizers, pesticides, and waste into water bodies, causing pollution.
6. Algal blooms deplete oxygen when they decompose, suffocating aquatic organisms.

Answer:

1. c. Sunlight is more abundant in the southern United States.
2. c. Ozone in the stratosphere is helpful but ground-level ozone is harmful.
3. b. Aerosol sprays
4. d. A & C are correct
5. d. Runoff
6. a. Algal blooms use up a lot of oxygen and block incoming sunlight to other organisms.