Question: Answer the following question given this paragraph: Using fossil fuels affects the environment in a variety of ways. There are impacts to the environment when we extract these resources. Burning these fuels causes air pollution. These fuels release carbon dioxide, which is a major factor in global warming ( Figure below ). Q: What gas is released by burning of fossil fuels and contributes to global warming? Choices: - nitrous oxide - hydrogen - helium - carbon dioxide A:
Answer: carbon dioxide

Question: Answer the following question given this paragraph: Figure below shows what happens to waves near shore. As waves move into shallow water, they start to touch the bottom. The base of the waves drag and slow. Soon the waves slow down and pile up. They get steeper and unstable as the top moves faster than the base. When they reach the shore, the waves topple over and break. Q: What happens when waves reach the shore? Choices: - diffuse and recede - surge and drown - repel and attract - topple and break A:
Answer: topple and break

Question: Answer the following question given this paragraph: Sometimes large numbers of species go extinct in a short amount of time. This is a mass extinction . The causes of different mass extinctions are different: collisions with comets or asteroids, massive volcanic eruptions, or rapidly changing climate are all possible causes of some of these disasters ( Figure below ). Q: What term is used to describe large numbers of species that go extinct in a short amount of time? Choices: - formation extinction - organic extinction - species extinction - mass extinction A:
Answer:
mass extinction