Topic 2- Pre Test

A substance that has neither a definite shape nor definite volume is a:

• Fluid

• Solid

• Liquid

• Gas

In a solid, particles do not move around each other, but they do:

• Change shape

• Vibrate

• Flow

• Sit completely still

Sugar is considered a crystalline solid because its particles are:

• arranged in a regular pattern

• Arranged randomly

• Completely motionless

• Able to move around one another

How is a gas different from a liquid?

• Liquid does not have a definite volume and gas does

• Gas particles are very close together

• Liquid has a definite volume and gas does not

• Particles do not remain in contact in a liquid or gas

Vaporization that takes place both above and below the surface is called

• Evaporation

• Boiling

• Condensation

• Precipitation

When a liquid freezes into a solid, the particles of the substance:

• Lose energy

• Gain energy

• Move faster

• Disappear

When the gas pressure above a liquid increases, the amount of thermal energy required for the liquid to vaporize:

• Decreases

• Increases

• Stays the same

• None of the above

Melting point is an intrinsic property: True or False

• True

• False

When the temperature of a gas decreases and volume is constant, the pressure of the gas:

• Stays the same

• Increases

• Decreases

• Becomes zero

Adding thermal energy to a gas at constant pressure will cause:

• The volume of the gas to decrease

• The volume of the gas to increase

• The temperature of the gas to decrease

• The pressure of the gas to decrease