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

Answer: Water at 20C in an uncovered pan is evaporating very slowly. What could be done to the water to make it evaporate more quickly?

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

Answer: What do playing a guitar, banging a drum, and dropping a pebble in the water have in common?

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

Answer:
What causes a blue block to appear blue in the sunlight?