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Answered

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Which TWO observations are evidence that a chemical change is happening?

A. A yellow liquid forms as a yellow solid is slowly heated.

B. Bubbles of gas are released when a solid is combined with a liquid.

C. Solid crystals form as the temperature of a liquid is lowered.

D. Light and heat are given off after a spark ignites a substance.​

Sagot :

sarahcaler

Answer: it is B and D light

Explanation: when a spark happens that is changing and bubbles is also changing

douthitm27

Answer:

its B and D

Explanation:

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