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

Answer: What structure can be found in both a virus and a cell?

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

Answer: Many houses are built on the sides of hills. Which of these actions would best prevent houses from sliding down hills after heavy rainfalls?

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

Answer:
The chemical symbol for niobium is Nb. Based on its symbol, what can be concluded about niobium?