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Question generated: Base your answer on the information below and on your knowledge of science. A baseball strikes the roof of a car and dents it. The paint on the roof begins to crack and chip, exposing the metal. The exposed metal on the roof rusts, eventually causing a small hole in the roof. Which event is a chemical change?

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Question generated: Where does a landslide begin?

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Question generated: The motion of Earth is responsible for several celestial events. Which of the following events is caused by Earth revolving around the sun?

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Certain fossils can be used to help determine the age of the rock layer in which the fossils are found. Which type of fossil is best to use when making this determination?