1. How does the ozone layer over the Arctic change with the seasons?
- It peaks in spring and decreases in fall.
- It peaks in fall and decreases in summer
- It peaks in summer and decreases in winter.
- It peaks in winter and decreases in spring

2. What are the qualities of a greenhouse gas? Select the two correct answers.
- Absorbs and re-emits infrared radiation
- Three or more atoms in a molecule
- Transparent to infrared radiation
- Composed of single atoms, not molecules
- Produced by human activity

3. In 3-5 sentences, explain the difference in good and bad atmospheric ozone and how each is distributed in Earths atmosphere.

4. In 3-5 sentences, analyze impacts of oceans on human populations as the result of climate change in the current century.

5. Scientists are monitoring the pH of oceans. Which of these are they most likely studying?
The level of carbon dioxide in the air
The population of polar bears
The health of coral colonies
The rise of sea level

6. What would happen if some of the worlds countries broke the Montreal protocol and industry began manufacturing and using chlorofluorocarbons again? In 3-5 sentences, describe the effect of this action on Earth’s atmosphere and surface.

Please answer these ASAP. I need help. (Raised points)