Exam Review: Matter

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements like gold and compounds like water.

Front

What is the difference between a solution and a suspension?

Back

Solutions are homogeneous mixtures where the solute is completely dissolved, and particles do not settle over time. Suspensions are heterogeneous mixtures where particles are dispersed but can settle over time.

Front

What is a colloid?

Back

A colloid is a mixture where very small particles of one substance are evenly distributed throughout another substance. Colloids do not settle out and can scatter light.

Front

What is the Tyndall effect?

Back

The Tyndall effect is the scattering of light by particles in a colloid or in very fine suspensions, which makes the path of the light beam visible.

Front

Give an example of a pure substance.

Back

Gold is an example of a pure substance.

Front

What type of particle diagram represents a pure substance?

Back

A diagram showing only one type of particle represents a pure substance.

Front

What is an example of a suspension?

Back

Muddy water is an example of a suspension.

Front

How do solutions differ from suspensions in terms of particle behavior?

Back

In solutions, particles do not settle over time, while in suspensions, particles can settle over time.

Front

What is the main characteristic of a homogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, meaning its components are evenly distributed.

Front

What is the main characteristic of a heterogeneous mixture?

Back

A heterogeneous mixture has a non-uniform composition, meaning its components are not evenly distributed.