Correct Evidence: A precipitate forms, Odor formation, Color change, Sounds produced, Bubbles or gas produced, Fire or light is produced, New substance is created, Incorrect Evidence: Substance evaporates, Changing state of matter, Substance is absorbed, Dissolving one substance into another, Nothing new is created, Gas sample expands when heated, Change in shape,

Evidence of a Chemical Reaction

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嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?