instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: The energy in sunlight, or solar energy, can be used to heat homes. It can also be used to produce electricity in solar cells. However, solar energy may not be practical in areas that are often cloudy. Answer: solar energy
answer:
The energy in sunlight is also known as what kind of energy?

question:
Passage: Runoff is likely to cause more erosion if the land is bare. Plants help hold the soil in place. The runoff water in Figure below is brown because it eroded soil from a bare, sloping field. Can you find evidence of erosion by runoff where you live? What should you look for?. Answer: erosion
answer:
Runoff is likely to cause more what if the land is bare?

question:
Passage: Chemical reactions always involve energy. Energy is a property of matter that is defined as the ability to do work. When methane burns, for example, it releases energy in the form of heat and light. Other chemical reactions absorb energy rather than release it. Answer: energy
answer:
Chemical reactions always involve what?