question: Write a question you would see in a school textbook. OPTIONS:
- two oceanic plates converging
- two continental plates converging
- two continental plates diverging
- two oceanic plates diverging
answer: Which of these explains how a trench can form?

question: Write a question you would see in a school textbook. OPTIONS:
- It proves there is life on Mars.
- It provides evidence there may be life on Mars.
- It proves there was an advanced civilization on Mars.
- It provides evidence of an advanced civilization on Mars.
answer: What is significant about the discovery of water on Mars?

question: Write a question you would see in a school textbook. OPTIONS:
- abundant rain in the Ozarks
- excessive pumping from wells
- dams on the lower Mississippi
- community water conservation
answer:
Some of Earth's water is stored underground in porous rock formations known as aquifers. Which of these could use up groundwater in aquifers?