Using the models what can you deduce about matter as it changes states?

Question

As matter moves from gas to solid, atoms gain energy and spread out.
As matter moves from solid to gas, atoms become more compact.
As matter moves from gas to solid, it gains atoms as they multiply.
As matter moves from solid to gas, atoms gain energy and spread out.

Answer 1

The correct answer is: As matter changes states, the arrangement and movement of its constituent particles (atoms, molecules, or ions) change. The models show that the amount of kinetic energy, or energy of motion, of the particles in matter generally increases as it changes from a solid to a liquid to a gas. As the particles gain energy, they move faster and farther apart, causing an increase in volume and a decrease in density. Conversely, as matter changes from a gas to a liquid to a solid, the amount of kinetic energy generally decreases, causing the particles to slow down and come closer together. This results in a decrease in volume and an increase in density. So, the models reveal that matter can change in state due to changes in temperature, pressure, or both.

Answer 2

In other words:
As matter moves from solid to gas, atoms gain energy and spread out.