FSA Review Big Idea 1 & 2, 8 & 9

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. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change occurs when a substance transforms into a different substance with new chemical properties. Examples include burning, rusting, and cooking.

Front

How can you separate a mixture of salt and iron filings?

Back

You can use a magnet to pull the iron filings from the salt.

Front

What happens to water when it freezes?

Back

Water undergoes a physical change from a liquid to a solid when it freezes.

Front

What effect does stirring have on the dissolving rate of salt in water?

Back

Stirring increases the rate at which the salt cube dissolves in water.

Front

What is insulation?

Back

Insulation is a material that reduces the transfer of heat, keeping things warm or cold.

Front

Why is it important to repeat an experiment?

Back

Repeating an experiment helps ensure that the results are valid and reliable.

Front

What is the role of a thermometer in an experiment?

Back

A thermometer measures the temperature of a substance, which can be important for understanding changes in state or heat transfer.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties and can be separated by physical means.

Front

What is the difference between a solid, liquid, and gas?

Back

Solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither a definite shape nor volume.