Particle Motion and Energy

Select the correct answer. How does the motion of particles of an ice cube change as the cube melts into water?

• Particles move faster and flow past each other.

• Particles move slower and vibrate in place.

• Particles stop moving.

• Particles move closer together.

Select the correct choice. Which statement best describes diffusion?

• Particles move from low to high concentration.

• Solid particles vibrate between areas of different concentrations.

• Gas particles move and collide between areas of different concentrations.

• Particles move from high to low concentration.

Select the correct choice. What is true about the gas particles?

• They stay in one place.

• They move freely and collide with each other.

• They move in a fixed pattern.

• They vibrate in their place.

Select the correct option. What causes the perfume smell to spread out in the air?

• light

• diffusion

• vibration

• gravity

Select the correct choice Water can be in different states of matter: ice, liquid water, and water vapor. Which statement about the water particles motion is true?

• Only liquid and gas particles move.

• Particles in solids and liquids do not move.

• Only gas particles move.

• Particles in all matter are always in motion.