Which of these is an example of a physical change?
sugar, when heated, producing carbon...
Which of these is an example of a physical change?
sugar, when heated, producing carbon dioxide and water
solid ice, when heated, turning into liquid water
sodium, when exposed to chlorine, forming sodium chloride
aluminum, when heated in air, forming aluminum oxide
Answers: 3
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Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n)
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Stage in which a star’s outer layers have started to cool and grow outward?
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What is the approximate vapor pressure when the gas condenses at 70 degrees celsius
Answers: 2
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Which radioisotope is used to date fossils? a. oxygen-16 b. carbon-14 c. uranium-238 d. carbon-12
Answers: 2
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