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Physics 8 Online
OpenStudy (anonymous):

Mario places 10 mL of water in a test tube and heats the liquid over a Bunsen burner for 2 minutes. After removing the test tube from the Bunsen burner, there are 6 mL of water left in the test tube. This experiment is a good example of a physical change involving chemical reactions. chemical change involving phase changes. chemical change involving chemical reactions. physical change involving phase changes.

OpenStudy (anonymous):

The last one

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