Which of the following is an example of a chemical change?
A. gasoline being used in the engine of a car producing exhaust
B. water freezing into ice crystals
C. a piece of metal expanding when heated, but returning to original size when cooled
D. aftershave or perfume on your skin generating a smell
E. breaking a glass window
Answer: A
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A. acceleration. B. inertia. C. gravity. D. all of the above
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Answer the following statement true (T) or false (F)
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Indicate whether the statement is true or false
All of the following could cause global cooling except
A. increased sulfate aerosols in the atmosphere. B. increased volcanic ash in the atmosphere. C. increased cloud cover. D. increased carbon dioxide in the atmosphere.