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

Answer: Which reaction is endothermic?

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

Answer: Humans cannot survive without clean, fresh water. Reservoirs of liquid water vary, but all water spends time as a gas in the atmosphere. What is the source of most of the water in the atmosphere?

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

Answer:
In one area, a large source of prey for eagles is rabbits. If the number of rabbits suddenly decreases, what effect will it most likely have on the eagles?