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A ball on a cart is moving at a rate of 2 m/s. The cart suddenly stops and the ball continues to travel in the same direction at the same speed. This is an example of the

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Question generated: Extinction of a species is most likely to occur as a result of

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

Answer: Which of the following is the best observation of the refraction of light?

question: Write a question you would see in a school textbook. OPTIONS:
- a collection of gases held together by inertia
- a group of planets revolving around a single star
- a collection of stars and gases with the Sun as its center
- a group of stars, dust, and planets held together by gravity
answer: Which statement is the best description of the Milky Way galaxy?

An example of a grad-school level question?
Which scientist studied biology by traveling by ship to different islands observing animal life, and developed a hypothesis about how species change?

Random question?
The orbit of Earth is almost circular and has a period of about 365 days. Compared to the orbit of Earth, which of these objects usually have highly elliptical orbits and can have periods of over 1000 years?