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

Question I was asked: It is necessary to add a day to the calendar every four years because

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Nonrenewable sources of energy have limited supplies. Researchers are developing devices that will make renewable energy more available. Which is a source of renewable energy?

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Question generated: A condition in bees called "colony collapse disorder" occurs when worker bees leave the hive to collect nectar and never return. How would a decline in the bee population most likely affect a farm ecosystem?

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

Answer: In which process is nitrogen from the air put into a form that plants can use?

question: Write a question you would see in a school textbook. OPTIONS:
- conduction
- convection
- radiation
- transformation
answer: A student standing near a campfire feels warmer as the fire grows. Which process most likely transfers heat from the campfire to the student?

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Question generated:
Oxygen reacts with iron to produce rust and with hydrogen to produce water. Which statement describes both reactions?