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Evidence of Chemical Reactions
Worksheet
Grade Level
Physical Science with Earth and Science
9.36 Evidence of Chemical Reactions
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A class heats two liquids while mixing them, and the temperature rises. Why is the temperature increase not enough evidence by itself?
A
Chemical reactions never happen in liquids.
B
Thermometers cannot detect energy changes.
C
The added heat is a confounding factor that could explain the warming.
D
Mixing always prevents temperature changes.
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