(Question)
Answer the following question given this paragraph: Polar tundra climates occur near the poles. Tundra climates have permafrost. Permafrost is layer of ground below the surface that is always frozen, even in the summer. Only small plants, such as mosses, can grow in this climate. Q: What is the layer of ground below the surface that is always frozen, even in the summer? Choices: - tundra - bedrock - upper crust - permafrost A:
(Answer)
permafrost

(Question)
Answer the following question given this paragraph: Water is essential to life because biochemical reactions take place in water. Most people can survive only a few days without water. Q: Most people can survive only a few days without what essential substance? Choices: - air - food - carbon - water A:
(Answer)
water

(Question)
Answer the following question given this paragraph: Ears pop as air pressures inside and outside of the ear equalize. Q: As air pressures inside and outside of the ear equalize, what phenomenon is produced? Choices: - eyes blinking - throat scratching - heart skipping - ear popping A:
(Answer)
ear popping