I just took a test in school today. What question was I asked?

Question I was asked: What is the name of the product formed from the reaction shown below? 4Fe(III) + 3O_{2} -> 2Fe_{2}O_{3}

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There is a river at the base of Mount Tom. In the spring the water level is usually very high. In the summer it is lower. The higher level of water during the spring comes from

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Question generated: Which characteristic is found ONLY in mammals?

Problem: Write a question you would see in a school textbook.

Answer: A group of scientists predicts that Earth's oceans will be able to take up more carbon dioxide as atmospheric carbon dioxide levels increase and the atmosphere warms. Which of these statements about the solubility of gases in ocean water would lead you to question this prediction?

question: Write a question you would see in a school textbook. OPTIONS:
- It scrapes small particles off large rocks.
- It carries plants down mountains and to oceans.
- It melts and becomes part of streams and rivers.
- It freezes small particles of dirt to form large rocks.
answer: A glacier is a slow moving river of ice. How does a glacier help create soil?

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Question generated:
An Italian scientist named Alessandro Volta invented the Voltaic pile in 1800. It was able to produce a steady electrical current. Based on this description, what is the modern equivalent of the Voltaic pile?