When the sun heats up water in rivers, lakes and oceans, what does it turn the water into?
Clouds get heavy and water falls back to the earth in what form?
When water is 32 degrees Fahrenheit or 0 degrees Celsius and colder, it is in what state?
H2O is the chemical name for water. What does the H stand for?
Why can't we drink ocean water?
These cover about 75% of the Earth's surface.
Where is most of the freshwater on Earth found?
Which river flows from Minnesota to the Gulf of Mexico?
What does condensation do on a cold surface?
Humidity is a calculation of the amount of what in the air?
According to the book Water: Sources, Use, Conservation by Nancy Carlson: Of all the earth's water, about how much is fresh water?
According to the book Water: Sources, Use, Conservation: An acre of corn transpires up to how many gallons of water each day?