MECHANICAL: Energy and Kinetic theory

What happens to particle movement/speed when energy is added to a phase?

• Particles slow down
• Particles go faster
• Particles don't move
• Particles stay the same speed

What happens to particle spacing when energy is added to a phase? 

• Particles move farther apart
• Particles move closer together
• Particles stay the same

According to the kinetic-molecular theory, particles of matter

• are in constant motion

• have different colors

• have different shapes

• are always fluid.

According to the kinetic-molecular theory, which substances are made of particles?

• gases only

• all matter

• liquids only

• all matter except solids

The particles in a liquid are usually

• closer together and lower in energy than those in a solid.

• farther apart and higher in energy than those in a gas.

• closer together and lower in energy than those in a gas.

• farther apart and lower in energy than those in a solid.

A solid forms when the average kinetic energy of a substance's particles

• increases.

• decreases then increases.

• decreases.

• creates a random arrangement.

Particles within a solid

• do not move.

• move about freely.

• vibrate about fixed positions

• exchange positions easily.