question: Write a question you would see in a school textbook.
answer: Which is a nonrenewable natural resource that is used to make electrical energy?

question: Write a question you would see in a school textbook.
answer: Oil, coal, and natural gas are fossil fuels formed under what conditions?

question: Write a question you would see in a school textbook.
answer:
During a lab investigation a scientist heats a solid substance. The scientist observes that the solid has two different melting points. The scientist is able to separate the two resulting liquids. Which statement best classifies the original solid substance?