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1 | |
Scientists use a number of different sources of information in order to study the climate of the past (paleoclimatology). Which of the following is not one of these sources? |
| | A) | Ice samples from glaciers |
| | B) | Petrified tree sap samples. |
| | C) | Water samples |
| | D) | Tree Rings |
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2 | |
Scientists have found strong evidence that climates in many regions of the world have changed in the past. Which of the following are possible reasons that they have identified for these changes:
1. Catastrophic Events
2. Positive & Negative Feedback Loops
3. Mass extinction
4. Prairie Wildfires
5. Fluctuations in the tilt of Earth's Axis. |
| | A) | 1, 2, 5 |
| | B) | 2, 4, 5 |
| | C) | 1, 2, 3 |
| | D) | 1, 4, 5 |
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3 | |
The theory of continental drift states that the movement of the continents is due to: |
| | A) | Massive collisions from asteroids and meteorites. |
| | B) | Volcanic eruptions have caused new land to form while destroying existing land. |
| | C) | Movement of large plates on which the continents rest. |
| | D) | Changes in Earth's speed of rotation. |
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4 | |
Feedback loops are present throughout science. Some are positive and some are negative. An example of a negative feedback loop in climate change would be: |
| | A) | As global temperatures rise, so do atmospheric levels of carbon dioxide. These high levels reduce plant transpiration and further increase global temperatures. |
| | B) | A decrease in average global temperature causes the polar ice caps to grow further reducing the global temperature. |
| | C) | An increase in average global temperature causes a melting of polar ice caps, further raising global temperatures. |
| | D) | Increased levels of carbon dioxide in the atmosphere increases the average temperature but also increases the amount of cloud cover which reduces the amount of solar radiation that reaches the ground and this decreases the temperature. |
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5 | |
Scientists propose that mass extinction events such as the extinction of the dinosaurs, might have occurred because: |
| | A) | Continental drift caused the climate to change, putting dinosaurs, or other species, into region where plants could not grow fast enough to feed the animals. |
| | B) | A catastrophic event such as a meteorite colliding with Earth created so much dust in the atmosphere that it prevented most of the sunlight from reaching green plants. When plants grew more slowly, there was not enough food for the dinosaurs. |
| | C) | Human activity caused changes in the biomes making conditions too difficult for certain species to survive. |
| | D) | Increasing carbon dioxide levels in the atmosphere made it too difficult for some species to breath. |
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6 | |
How can weathering reduce the amount of carbon dioxide in the atmosphere? |
| | A) | Freezing and thawing of water in rock crevices cause weathering. Weathering does not involve carbon dioxide. |
| | B) | Carbon dioxide becomes trapped in bubbles in rocks and is thus removed from the atmosphere. |
| | C) | In a severe thunderstorm, carbon dioxide is washed out of the air and seeps into the ground. It becomes trapped in the soil. |
| | D) | Carbon dioxide reacts with water vapour in the atmosphere to form carbonic acid. The carbonic acid reacts with some types of rocks and forms calcium carbonate. This process wears down rocks. |
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