Chemical vs. Physical Changes

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without changing its chemical composition.

Front

What is a chemical change?

Back

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

Front

Can blending fruits together be considered a physical change?

Back

Yes, blending fruits together is a physical change because the fruits retain their original properties.

Front

What happens to gallium when it melts?

Back

When gallium melts, it changes from solid to liquid but remains gallium.

Front

What is the flame test used for?

Back

The flame test is used to identify the presence of certain gases, like hydrogen.

Front

Is mixing air into egg whites a physical or chemical change?

Back

Mixing air into egg whites is a physical change.

Front

Why is mixing air into egg whites considered a physical change?

Back

Because the gas (air) is the same before and after the mixing.

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rust forming on iron.

Front

What happens to the properties of a substance during a chemical change?

Back

The properties of a substance change during a chemical change because new substances are formed.