Chemistry Unit Review 2.0

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. Example: Getting a haircut.

Front

What is condensation?

Back

Condensation is the process of changing from a gas to a liquid. Example: Water droplets forming on a cold glass.

Front

What is mass?

Back

Mass is the amount of matter in an object, typically measured in grams or kilograms.

Front

What is sublimation?

Back

Sublimation is the process of changing directly from a solid to a gas without passing through the liquid state. Example: Dry ice turning into carbon dioxide gas.

Front

What type of bond forms when a nonmetal combines with another nonmetal?

Back

Covalent bond.

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 is vaporization?

Back

Vaporization is the process of changing from a liquid to a gas. Example: Water boiling to form steam.

Front

What is melting?

Back

Melting is the process of changing from a solid to a liquid. Example: Ice melting into water.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Example: Rust forming on iron.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.