(Question)
Answer the following question given this paragraph: When sunlight heats Earth's surface, some of the heat radiates back into the atmosphere. Some of this heat is absorbed by gases in the atmosphere. This is the greenhouse effect , and it helps to keep Earth warm. The greenhouse effect allows Earth to have temperatures that can support life. Q: What effect in the atmosphere ensures that the earth maintains the correct temperature to support life? Choices: - coriolis effect - ozone effect - smog effect - greenhouse effect A:
(Answer)
greenhouse effect

(Question)
Answer the following question given this paragraph: Continental glaciers are large ice sheets that cover relatively flat ground. These glaciers flow outward from where the greatest amounts of snow and ice accumulate. Q: What are large sheets of ice that cover relatively flat ground called? Choices: - land glaciers - cellular glaciers - rocky glaciers - continental glaciers A:
(Answer)
continental glaciers

(Question)
Answer the following question given this paragraph: Gamma rays are the most energetic of all electromagnetic waves. They can pass through most materials, including bones and teeth. Nonetheless, even these waves are useful. For example, they can be used to treat cancer. A medical device sends gamma rays the site of the cancer, and the rays destroy the cancerous cells. If you want to learn more about gamma rays, watch the video at the URL below. Q: What are the most energetic of all electromagnetic waves, which can be used to treat cancer? Choices: - ultraviolet - infrared - X-ray - gamma rays A:
(Answer)
gamma rays