How does heat affect the motion of particles and solids and liquids?

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particlesdetermines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

Result of increased molecular motion is that the object expands and takes up more space.

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