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

Answer: How are green plants an important part of the carbon dioxide-oxygen cycle?

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

Answer: Which event can cause a large rock to become soil over time?

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

Answer:
Which of the following has the greatest effect on the speed at which sound travels through a gas?