question: Write a question you would see in a school textbook. OPTIONS:
- particles in the air
- rocks containing fossils
- tree rings from recently logged trees
- chemicals in human hair
answer: Evidence that living things have evolved over hundreds of millions of years can be found in

question: Write a question you would see in a school textbook. OPTIONS:
- erosion
- conduction
- condensation
- precipitation
answer: Which process must occur for clouds to form?

question: Write a question you would see in a school textbook. OPTIONS:
- fish
- bird
- tree
- mushroom
answer:
Which type of organism would most likely benefit directly from increased levels of CO_{2}?