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Chemical changes
Page 4
Questions (162)
A cut apple reacts with the oxygen in the air after being cut by turning dark, which is a physical change.(1 point)
Responses A.
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Short Answer
QUESTION 1 List the signs that indicate a chemical change has taken place. What does the presence or absence of
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A person mixes two liquids together as shown in the illustration below.
The person can conclude that there was a chemical change
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Is a banana reacting to oxygen and turning brown a physical or chemical change?
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b
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Choose all examples of chemical changes?
a. The planet Saturn is yellow in color. b. The Statue of Liberty oxidized and changed
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b
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Why do people cook meat and eggs before they eat them? The answer has to do in part with the chemical changes that take place
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A chemical change takes place when milk goes bad. Normally, bacteria in milk digest sugar and produce an acid. When too much of
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Sometimes you might not be able to see a new substance forming, so be on the lookout for evidence that a chemical change has
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Joe watches a candle burn. What chemical change does he observe?(1 point)
Responses The candle wax changes shape Heat and light
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Choose all examples of chemical changes?
A.The planet Saturn is yellow in color. B.The Statue of Liberty oxidized and changed in
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s
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Select TWO events that represent chemical changes that occur as a candle burns.
A. Heat and light are produced. B. The heat melts
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The picture shows an experiment in which a student mixed two clear liquids together.
The student can conclude that a chemical
1 answer
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Parent Categories (5)
Changes
Chemistry
Physical and Chemical Changes
Solutions and Reactions
Types of Reactions