Physical science review 1-2.3

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded together.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the components are evenly distributed and not distinguishable from one another, such as iced tea.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the components are not evenly distributed and can be easily distinguished, such as a salad.

Front

What is a suspension?

Back

A suspension is a type of heterogeneous mixture where solid particles are suspended in a liquid but are not dissolved.

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is completely dissolved in another (the solvent).

Front

What is the difference between suspensions and solutions?

Back

Suspensions have unmixed particles that can settle out, while solutions have completely mixed particles that do not settle.

Front

What happens to molecules when the temperature decreases?

Back

When the temperature decreases, the molecules slow down and move less energetically.

Front

What is a dependent variable?

Back

The dependent variable is the variable that is being measured or observed in an experiment.

Front

What is an independent variable?

Back

The independent variable is the variable that is changed or controlled in an experiment to test its effects on the dependent variable.

Front

What is a control variable?

Back

A control variable is a variable that is kept constant throughout an experiment to ensure that the results are valid.