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

Answer: Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal?

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

Answer: Earth is composed of layers of material with different properties. Which of the following is most likely to be in constant motion?

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

Answer:
Which of these resources is renewable?