What is this?
gas
What is this?
ice
Water in a river can __________ over stones.
flow
A book is a _________.
solid
On a hot day, ice cream can __________.
melt
I __________ water. It is now ice.
freeze
What is this?
heat
What is this?
steam
You can see _________ on very hot water.
steam
What is this?
flow
I make something hot. I __________ it.
heat
Water is a __________.
liquid
What is this?
freeze
What is this?
liquid
What is this?
solid
We put __________ in drinks to make them cold.
ice
What is this?
melt