question: Write a question you would see in a school textbook.
answer: Which of these can be mined from Earth and used as an energy source?

question: Write a question you would see in a school textbook.
answer: If a neutral atom loses an electron, what is formed?

question: Write a question you would see in a school textbook.
answer:
A large tree was cut down with a saw. What is the best way to estimate the age of this tree?