Physical Science Chemistry Review

Front

What is density?

Back

Density is the mass of a substance divided by its volume, usually expressed in g/cm³.

Front

How do you calculate density?

Back

Density = Mass / Volume.

Front

What is a coefficient in chemistry?

Back

A coefficient is the large number placed in front of a chemical formula to indicate how many molecules are present.

Front

What does pH measure?

Back

pH measures the concentration of hydrogen ions (H⁺) in a solution.

Front

Which solution has the highest acidity?

Back

Vinegar has the greatest concentration of H⁺ ions.

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.

Front

Give an example of a physical change.

Back

Crumpling paper is an example of a physical change.

Front

What is a chemical change?

Back

A chemical change occurs when a substance transforms into a different substance with different properties.

Front

Give an example of a chemical change.

Back

Sour milk is an example of a chemical change.

Front

What is nuclear fusion?

Back

Nuclear fusion is the process where two light atomic nuclei combine to form a heavier nucleus, releasing energy.