Big Idea 8 and 9

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include evaporation, melting, and freezing.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting, burning, and digestion.

Front

How do you measure the volume of a liquid?

Back

You measure the volume of a liquid using a graduated cylinder or measuring cup.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What happens to the volume of a gas when it is heated?

Back

When a gas is heated, its volume typically increases if the pressure remains constant.

Front

What is evaporation?

Back

Evaporation is the process by which liquid turns into vapor at temperatures below its boiling point.

Front

What is the principle of displacement?

Back

The principle of displacement states that the volume of an object submerged in a fluid is equal to the volume of fluid displaced by the object.

Front

What is temperature?

Back

Temperature is a measure of the average kinetic energy of the particles in a substance.

Front

What happens to the temperature of a substance during a phase change?

Back

During a phase change, the temperature of a substance remains constant while it absorbs or releases heat.

Front

What is condensation?

Back

Condensation is the process by which water vapor in the air is changed into liquid water.