The air in a balloon is a

• solid

• liquid

• gas

• plasma

Solids have a

• definite shape and volume

• definitie shape, but not volume

• definite volume, but not shape

• indefinite shape and volume

Which is an example of a physical change?

• burning food on the stove

• water boiling

• a banana rotting

• fireworks exploding

When a physical or chemical change occurs, the amount of matter present always stays the same.

• true

• false

Which is NOT an example of a chemical change?

• wood burning

• digesting food

• cooking an egg

• ice melting

In a physical change, the chemical components also change.

• true

• false

Which is a heterogeneous mixture?

• iced tea

• milk

• cereal

• milkshake

Which of the following is a homogeneous mixture?

• cereal

• salad

• trail mix

• coffee

Which type of mixture is salt water?

• heterogeneous

• homogeneous

Mayonnaise is an example of heterogeneous mixture.

• true

• false