Question

what is true about the particles in a substance? select all that apply. particles in a substance move only when they change state. the way particles move changes when the substances thermal energy changes. particles in all states of matter are arranged in the same way. cooling a substance can cause the substance to change state.

Explanation:

• Particles in a substance are in constant motion, not just when changing state, so the first statement is false.
• Thermal energy is related to particle motion. As thermal energy changes, the way particles move (speed and kinetic - energy) changes, so the second statement is true.
• Particles in different states of matter (solid, liquid, gas) have different arrangements, so the third statement is false.
• Cooling a substance can cause it to change from a gas to a liquid or a liquid to a solid, so the fourth statement is true.

Answer:

The way particles move changes when the substance's thermal energy changes.
Cooling a substance can cause the substance to change state.