Given a scientific passage and an answer, generate a question for the given answer.
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Question: Passage: The atmosphere protects living things from the Sun's most harmful rays. Gases reflect or absorb the strongest rays of sunlight. Figure below models this role of the atmosphere. Answer: the atmosphere

Answer: What is the name of the protective layer of gases that surrounds the earth and blocks harmful rays from the sun?

Question: Passage: The heat that is either absorbed or released is measured in joules. The mass is measured in grams. The change in temperature is given by , where is the final temperature and is the initial temperature. Answer: joules

Answer: In what unit is heat measured in?

Question: Passage: The liver breaks down excess amino acids and toxins in the blood. Answer: liver

Answer:
Which organ breaks down amino acids and toxins that are in the blood?