question: Write a question you would see in a school textbook.
answer: What atoms combine to make up a molecule of water? 1. 1 hydrogen, 1 oxygen 2.

question: Write a question you would see in a school textbook.
answer: In the carbon cycle, carbon moves from reservoir to reservoir as various organic and inorganic processes occur on Earth. Only a small percentage of the global carbon is moved in this cycle each year. The remaining carbon is stored in these reservoirs. Which reservoir contains the greatest amount of stored carbon?

question: Write a question you would see in a school textbook.
answer:
A small community is building their first water treatment plant, but has limited amounts of land and money available. One of the council members suggests reducing costs and land needs by leaving out the aeration pond. The plant supervisor explains that aeration is a necessary step in treating drinking water. What is the most important reason the town should include an aeration pond in their water treatment plant?