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.

This is caused by the formation of Polar Stratospheric Clouds (PSCs) during winter in the polar regions. These clouds offer a surface area on which the CFC chemical reaction occurs at a fast rate causing ozone depletion in the polar stratosphere by as much as 50%. This peaks at spring when the temperature begins to warm-up providing an increase chemical reaction rate of the surfaces of these clouds.

(2)

These greenhouse gases, therefore, prevent the escape of infrared radiation from the earth surface towards space. The absorption and re-emission of the radiation caused this radiation to be trapped in the atmosphere. Remember that infrared is the electromagnetic ration spectrum responsible for transferring heat energy. This is why the atmosphere warms up with an increase in greenhouse gases in the atmosphere.

(3)

The good kind of ozone is the one that is high p in the atmosphere in the stratosphere. It is significant because it prevents UV rays from reaching the earth’s surface which may be harmful to live organisms. The bad ozone is the one that forms in the lower atmosphere close to the earth’s surface because it is harmful when breathed in and also destroys vegetation. It is therefore a pollutant. Ozone is in large concentration near the tropic and lowest in the poles.

(4)

An increase in greenhouse gases is causing climate change. A significant phenomenon as a result is the enhanced melting of polar ice sheets and the increase in ocean surface levels. This results in the displacement of coastal communities as a result. Their migration may cause conflict due to competition for resources in the region they migrate to.

(5)

Coral is very sensitive to changes in ocean properties. This is why climate change is causing massive bleaching of coral around the world. This is because climate change has caused an increase in oceans' temperatures and pH. pH is a result of the increased capacity of dissolved carbon dioxide in the oceans. Increased formation of carbonic acid has caused a lowering of ocean pH.

(6)

Breaking of the Montreal protocol by signatory countries would cause an increase in emissions of CFCs into the atmosphere. This would result in an increased rate of depletion of the ozone. More UV rays would reach the earth's surface and affect living organisms on the earth’s surface. This is because destroys genetic materials by causing double-stranded breaks. This creates a recipe for increased rates of cancers.