Snow and _____ are frozen water.
ice
Water covers most of the _____'s surface.
Earth
_____ water is the most common state of Earth's water.
solid
gas
liquid
When water becomes very cold it freezes. It becomes _____ water.
solid
liquid
gas
Some of Earth's water is _____. You cannot see it.
invisible
Water vapor is a _____.
solid
gas
liquid
_____ are made up of tiny drops of water.
Clouds
Rain, hail and snow are different kinds of ______.
precipitation
______ water makes people, plants and animals sick.
Polluted
Water keeps _____ alive and helps them to keep growing.
plants
