Physical Science Spring Semester Test

Define thermal expansion.

• The change of a solid directly into a gas.

• The process of a liquid turning into a solid.

• The increase in volume of a substance due to an increase in temperature.

• The decrease in volume of a substance due to an increase in temperature.

Define plasma.

• A state of matter that is always solid.

• A state of matter with a definite shape and volume.

• A state of matter consisting of free electrons and ions.

• A state of matter that is always liquid.

Where can we find plasma in our solar system?

• In the oceans.

• In between stars

• In the atmosphere.

• In the Earth's crust.

What are two ways that liquids can turn into solids?

• Boiling and sublimation.

• Melting and evaporation.

• Freezing and crystallization

• Freezing and condensation.

What do you call the change of state in which a solid turns directly into a gas? (Give an example.)

• Condensation, like water vapor forming dew.

• Freezing, like water turning into ice.

• Sublimation, like dry ice turning into carbon dioxide gas.

• Melting, like ice turning into water.

Give 5 examples of changes in state.

• Freezing, melting, boiling, oxidation, reduction.

• Freezing, melting, boiling, evaporation, solidification.

• Freezing, melting, boiling, condensation, sublimation.

• Freezing, melting, boiling, precipitation, erosion.

What do you call a substance that acts as two different states of matter? (such as oobleck)

• A solid.

• A liquid.

• A gas.

• A non-Newtonian fluid.

Explain the energy levels of solids, liquids, and gases.

• Solids and gases have the same energy level, higher than liquids.

• Solids have the highest energy, followed by liquids, then gases.

• Liquids have the highest energy, followed by gases, then solids.

• Gases have the highest energy, followed by liquids, then solids.

Find the pressure exerted by a force of 8000 on an area of 25. Give your answer in newtons/m^2.

A TV is placed on a table. The area of the TV in contact with the table is 750 m^2. The pressure on the table is 1760 newtons/m2. Work out the force exerted by the TV on the table.