Final answer:
The particles in solids, liquids, and gases do not move at the same speed. Solids have particles that vibrate in fixed positions, liquids have particles that move more freely but are still closely packed, and gases have particles that move very quickly and spread out.
Step-by-step explanation:
The particles in solids, liquids, and gases do not move at the same speed. The speed of particles in a substance depends on its state of matter. In solids, particles vibrate in fixed positions, so they have the least amount of movement. In liquids, particles move more freely, but they are still closely packed. Gases have particles that move very quickly and are able to spread out and fill the space they are in.
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