9-1 Matter and Energy

The kinetic theory helps to explain the differences between

• temperatures of objects.

• particles of matter.

• types of motion.

• states of matter.

A state of matter that is not a fluid is

• plasma

• gas

• liquid

• solid

What happens to the particles of a substance when it condenses?

• Particles speed up and spread out.

• Particles slow down and clump together.

• Particles stick together and stop moving.

• Particles vibrate as they lose energy.

According to the kinetic theory of matter, which of the following statements is true about matter?

• The higher the temperature of a substance, the faster its particles move.

• More massive particles move more slowly than less massive particles.

• The atoms and molecules of a substance are always in motion.

• All of the above

Which state of matter will hold its shape without a container?

• solid

• liquid

• gas

• plasma

What determines the speed of the atoms and molecules of a particular substance?

• size of the atoms and molecules

• temperature of the substance

• Both of these

• None of the above

The heavier a particle, the _____ it moves.

• slower

• faster

• less

• more

The particles can slide past each other, but are still packed together.

• solid

• liquid

• gas

• plasma

The particles are in constant motion and rarely stick together.

• solid

• liquid

• gas

• plasma

The process of a liquid becoming a solid is called

• condensation

• evaporation

• freezing

• melting