Physical Science Midterm

A gas has

• a definite volume but no definite shape.
• a definite shape but no definite volume.
• no definite shape or definite volume.
• a definite volume and definite shape.

Matter that has a definite volume but no definite shape is a

• liquid
• solid
• gas
• plasma

In which of the substances are the forces of attraction among the particles so weak that they can be ignored under ordinary conditions?

• solid
• liquid
• gas
• vapor

What is the result of a force distributed over an area?

• temperature
• volume
• pressure
• mass

Which of the following factors affect the pressure of an enclosed gas?

• temperature
• volume
• number of particles
• all of the above

The temperature and volume in a closed container of gas remain constant. If the number of particles of gas is increased, the gas pressure will

• increase
• decrease
• stay the same
• none of the above

The law that states that the volume of a gas is directly proportional to its temperature in kelvins if the pressure and the number of particles is constant is

• Charles
• Boyle
• Pascal
• Kelvin

During a phase change the temperature

• increases
• decreases
• stays the same
• increases or decreases depending on the change

During what phase change does the arrangement of water molecules become more orderly?

• melting
• freezing
• boiling
• condensing

The phase change in which a substance changes from a liquid to a gas is

• deposition
• sublimation
• condensation
• vaporization