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25-09-2019
Biology

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Which Is A Clue That A Chemical Change Has Occured?
A. A beaker suddenly becomes very warm when you mix two room-temperature liquids in it.
B. A liquid forms bubbles when it reaches a high temperature.
C. Water changes color when you add food coloring to it.
D. A car door feels hot if you touch it on a summer afternoon.

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FabledHistorian FabledHistorian

25-09-2019

Answer: A

Explanation:

B: That’s boiling

C: That’s physical.

D: That’s just heat being added.

It’s A because two liquids making one warmer liquid isn’t natural without a chemical making it do so.

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