Question

what happens to the particles in a substance as you lower the temperature?
the particles gain more energy, causing them to move around more, spread out, and take up more volume.
the particles lose energy, causing them to slow down, come closer together, and take up less volume.
it depends on the substance; some substances will have particles that gain energy, and some substances have particles that will lose energy.
the particles slowly lose energy until they stop moving altogether.

Explanation:

Temperature is related to the kinetic energy of particles. As temperature decreases, kinetic - energy of particles reduces. Particles move slower, get closer, and volume may decrease. Absolute zero (lowest possible temperature) is unattainable in practice, so particles never truly stop moving.

Answer:

The particles lose energy, causing them to slow down, come closer together, and take up less volume.