S1 Final Exam - Unit 2 review

Front

What is the definition of a liquid?

Back

Liquids have a definite volume and molecules that are spread out and can move past one another.

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, such as sharpening a pencil.

Front

How do you calculate density?

Back

Density is calculated by dividing the mass of an object by its volume (Density = Mass/Volume).

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas is a sign that a chemical reaction has occurred.

Front

What is Kool-Aid classified as?

Back

Kool-Aid is classified as a Homogeneous Mixture.

Front

What is the definition of a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout, and the individual components are not distinguishable.

Front

What is the definition of a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the composition is not uniform and the individual components can be seen and separated.

Front

What is the difference between a physical property and a chemical property?

Back

A physical property can be observed without changing the substance's identity, while a chemical property describes a substance's ability to undergo a chemical change.

Front

What happens to the volume of water when an object is submerged in it?

Back

The volume of water rises by an amount equal to the volume of the submerged object.

Front

What is the definition of a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.