Chemistry Unit 1

The amount of force exerted over a certain area is known as

• heat.

• temperature.

• thermal energy.

• pressure.

As you increase the speed of the particles in a container, you also

• decrease how many collisions there will be.

• decrease the temperature.

• increase the pressure.

• decrease the volume.

State change from a liquid to a solid.

• melting

• sublimation

• deposition

• freezing

Thermal energy is the

• total energy of the motion of the atoms and molecules.

• measure of the average kinetic energy of the particles.

• temperature of the atom and molecules.

• difference between potential and kinetic energy.

At high temperatures, the particles in a substance

• move very quickly.

• move very slowly.

• don't move at all.

• begin to freeze.

Thermal energy that is transferred from a warmer object to a cooler object is called

• potential energy.

• temperature.

• motion.

• heat.

What usually happens to a solid when its particles gain enough energy to break away?

• The solid begins to evaporate.

• The solid begins to melt.

• The solid begins to boil.

• The solid begins to sublimate.

What usually happens to a liquid when its particles gain enough energy to break away?

• The liquid begins to cool.

• The liquid begins to condense.

• The liquid begins to evaporate.

• The liquid begins to sublimate.

Substances that sublimate

• change from a solid to a gas.

• do not enter a liquid state at all.

• do not melt when they gain thermal energy.

• all of the above.

Changing from a gas to a solid is called

• melting.

• deposition.

• sublimation.

• contraction.