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When you pour liquid in a test tube, the edges of the water curve upward. This is an example of

User Dorean
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Answer:

Step-by-step explanation:

When water is poured in a test tube, all the water goes to the bottom, because of gravity. When it all goes to the bottom, some of the molecules get pushed out of the way, especially in a thin, long container ( like a test tube)

User Daniel Harding
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