Understanding States of Matter

What state of matter is air?

• solid

• liquid

• gas

• metal

Which of these is a solid?

• water

• ice

• oxygen

• steam

What happens to water when you put it in the freezer?

• It disappears

• It turns into a gas

• It turns into ice

• It changes color

What do all solids have in common?

• They have a fixed shape

• They can flow like water

• They take the shape of their container

• They always feel soft

What happens when an ice cube melts?

• It changes from a solid to a gas

• It changes from a solid to a liquid

• It changes from a liquid to a solid

What does "reversible change" mean?

• The material can go back to what it was like before it changed

• Once it has changed, it is stuck like that forever

• The material will start moving backwards

Which of these can change shape when you squeeze it?

• rock

• sponge

• chair

• pencil

If you take apart an old toy and make a new one, how could the toy have changed? (Choose 2)

• It changed color

• It changed shape

• It changed size

Which of these are solids? (Choose 3)

• clay

• ice

• metal

• coffee

• air

What covers most of the Earth's surface?

• mountains

• forests

• water

• deserts