Substances can change from a solid to a liquid. For most substances, this change makes their atoms or molecules A. stop moving completely. B. move slower and closer together. C. move faster and farther apart. D. double in size.
Question
Substances can change from a solid to a liquid. For most substances, this change makes their atoms or molecules A. stop moving completely. B. move slower and closer together. C. move faster and farther apart. D. double in size.
Solution
The correct answer is C. move faster and farther apart. When substances change from a solid to a liquid, it's because they're being heated. This heat energy makes the atoms or molecules vibrate faster and move around more freely, causing them to move farther apart from each other. This is what causes the substance to change from a solid state, where the atoms or molecules are tightly packed together, to a liquid state, where they have more freedom to move around.
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