Changes in Matter - Review

Front

What is a mixture?

Back

A mixture is a combination of different materials that are put together, but each material keeps its own properties.

Front

What is a chemical change?

Back

A chemical change is a change in matter that changes the identity of the matter.

Front

What is a physical change?

Back

A physical change is a change in matter that does not affect the type of matter.

Front

What happens to a sugar cube when it dissolves in hot coffee?

Back

The sugar cube breaks down into smaller particles and spreads throughout the coffee.

Front

What can speed up the dissolving of a sugar cube in coffee?

Back

Stirring the hot coffee can help the sugar cube dissolve more quickly.

Front

What can slow down the dissolving of a sugar cube in coffee?

Back

Adding ice to the coffee can slow down the rate of dissolving.

Front

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

Back

You can use a magnet to attract the iron filings.

Front

What is an example of a chemical change?

Back

Cooking pancakes is an example of a chemical change.

Front

What is an example of a physical change?

Back

Candle wax changing from a solid to a liquid due to heat is a physical change.

Front

What is the effect of temperature on dissolving?

Back

Higher temperatures generally increase the rate at which substances dissolve.