結果 : what is chemical change and examples
5:24

Physical and Chemical Changes: Chemistry for Kids - FreeSchool

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Chemical and Physical Changes – Quiz Edition

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Chemical Changes: Crash Course Kids #19.2

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What triggers a chemical reaction? - Kareem Jarrah

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Chemical Change – Bicarbonate Soda and Vinegar

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Physical vs. Chemical Changes - General Science for Kids!

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Physical and Chemical Changes Lesson for Kids - Examples of Physical and Chemical Changes

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