Coach Book Lesson 3:States of Matter

Multiple Choice

Which type of arrangement and movement would particles of liquid mercury display?

• particles are closely packed together, and they vibrate back and forth.

• Particles are spread far apart, and they move very quickly

• Particles are close together, but they are able to slip past one another

• Particles are far apart, and electrons are detached from atoms

Multiple Choice

In which state of matter do particles spread and fill the volume of the container that holds them?

• gas

• ice

• solid

• liquid

Multiple Choice

How is plasma different from gas?

• Plasma has a definite shape, but gas does not

• Gas is hotter than plasma

• Electrons separate from atoms in plasma

• Gas has a definite volume, but plasma does not

Thermal Energy and Changes of State

Particles of matter are ALWAYS moving.

The energy of the particles is called THERMAL ENERGY. The particles move faster when the substance is warmer. They move slower when the substance is cooler. TEMPERATURE is a measure of the average thermal energy of the particles in a substance.

Multiple Choice

A scientist performs an investigation in which thermal energy is removed from a sample of a substance. When the substance begins to change from a gas to a liquid, the scientist measures the temperature of the substance. This temperature is the substance's

• melting point

• freezing point

• evaporation point

• condensation point