question: Write a question you would see in a school textbook.
answer: Scientists have measured the rate of growth of the Atlantic Ocean basin to be about 2 to 3 cm per year. This type of activity coincides with the formation of ridges on the ocean floor. What is the most likely cause of this activity?

question: Write a question you would see in a school textbook.
answer: Which two systems are involved when waste and water are removed from blood as it flows through the kidneys?

question: Write a question you would see in a school textbook.
answer:
Which statement about the Sun is true?