Physical and Chemical Changes

Front

What happens to a sugar cube when placed in hot water?

Back

It will dissolve.

Front

What is an example of melting?

Back

Heating a block of ice until it all turns to water.

Front

What state of matter always keeps its shape?

Back

Solid.

Front

Why is ice melting considered a physical change?

Back

Nothing new was created; there was only a change in the state of matter.

Front

What is a change in size, shape, or matter that does not create something new?

Back

Physical change.

Front

What is the definition of a physical change?

Back

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

Front

What is a chemical change?

Back

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

Front

Can physical changes be reversed?

Back

Yes, many physical changes can be reversed, such as freezing and melting.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash and smoke.

Front

What happens to the molecules in a substance during a physical change?

Back

The molecules may rearrange, but their chemical structure remains the same.