Random question?

Which is the thickest layer of Earth?

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Question generated: The brown fur of the arctic hare turns white in winter. How does this color change most likely help the arctic hare?

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

Answer: About how often is a full moon observed from Earth's surface?

question: Write a question you would see in a school textbook. OPTIONS:
- They work together to exchange gases.
- They work together to transport nutrients.
- They work independently to remove wastes.
- They work independently to relay messages.
answer: Arteries and veins are two important parts of the circulatory system. What is the relationship between arteries and veins?

An example of a grad-school level question?
Studies of snail fossils in Egypt indicate that areas of Egypt that are now desert were once thriving savannahs approximately 130,000 years ago. What does the presence of these fossils indicate about the area of Egypt that was thriving 130,000 years ago?

Random question?
Which best describes a characteristic of the jet stream?