Water is the only substance known that occurs naturally in the 3 states of matter: liquid, solid (ice), and gas (water vapor).
Source: Raintree Illustrated Science Encyclopedia
Water is colorless and tasteless.
Condensation is the change of water vapor into liquid water.
Source: All About Water, by Melvin Berger
Water covers about 71% of the earth's surface. There are approximately 1.4 billion cubic kilometers of water on earth.
Source: Raintree Illustrated Science Encyclopedia
Approximately 97% of the earth's water is salt water. Approx. 3% is fresh water. Approx. two-thirds of the fresh water is frozen at the North and South Poles.
Source: Raintree Illustrated Science Encyclopedia
There is 50 times more water buried in the ground than there is in all streams, rivers, and lakes on the surface of the earth.
Source: The New Book of Knowledge
When water is absorbed into the ground, the process is called percolation.
Source: Harris-Galveston Coastal Subsidience District & Fort Bend Subsidence District
Water found underground is called ground water.
Source: Harris-Galveston Coastal Subsidience District & Fort Bend Subsidence District
Porous rocks and sand that hold underground water are called aquifers.
Source: Junior Science Book of Water
There are three chief sources of water pollution: industrial wastes, sewage, and agricultural chemicals and wastes.
Source: World Book Encyclopedia
The Water Pollution Control Act was passed by Congress over President Nixon's veto on October 18, 1972. It required industry to halt discharges by 1985, set industry-wide standards, and provided massive federal funding for building and improving sewage plants.
Source: Encyclopedia of American Facts and Dates
Chicago's main water purification plant is the largest water treatment plant in the world. It serves approximately 2.8 million people in the Chicago area and can produce nearly one and one-half billion gallons (5.7 billion liters) of water per day.
Source: World Book Encyclopedia
Water can never be used up. Every glass of water you drink contains molecules of water that have been used countless times before.
Source: World Book Encyclopedia
The world's available water per capita has decreased by more than one-third since 1970 due to the more than 1.8 billion people added to the planet since then.
Source: Greenbeat
If you could put all the water in the world in a 10-gallon container and you removed all the salt water, all the polluted water, and all the frozen water in glaciers and icebergs, you'd have only 9 drops of useable water left.
Source: Harris-Galveston Coastal Subsidience District & Fort Bend Subsidence District
Today, six out of ten people inhabit coastal regions.
Source: Random House Atlas of the Oceans
The first water-powered plant for generating electricity was built in Appleton, WI, in 1882.
Source: World Book Encyclopedia
The U.S. has about one-sixth of the world's developed hydroelectric power.
Source: World Book Encyclopedia
Water power supplies about 3% of the electric power in the U.S. and about 6% of the electric power worldwide.
Source: The New Book of Knowledge
Potable water is that intended for human use such as drinking or cooking.
Source: McGraw Hill Encyclopedia of Science and Technology
Water expands by about 9% as it freezes.
Source: New Encyclopedia of Science
- Watermelons are 97% water.
- Lettuce is 97% water.
- Tomatoes are 95% water.
- Carrots are 90% water.
- Potatoes are 80% water.
- Eggs are 74% water
- Bread is 30% water.
- Cheese is 26% water
Source: All About Water, by Melvin Berger, Raintree Illustrated Science Encyclopedia, & 1002 Fascinating Facts and Figures
The average American uses an estimated 100-150 gallons of water per day. Water is used as follows:
- Approx. 10 gallons to brush teeth if water is left running
- Approx. 10 gallons to flush a toilet
- Approx. 25 gallons to take a bath
- Approx. 5-10 gallons per minute of a shower
- Approx. 40 gallons to run a dishwasher
Source: Raintree Illustrated Science Encyclopedia, The New Book of Knowledge & World Book Encyclopedia
Industry is the largest single user of water.
Source: World Book Encyclopedia
The U.S. uses approx. 140 billion gallons (530 billion liters) of water per day for irrigation. - It takes about 800,000 gallons of water per day to grow an acre of cotton. - It takes about 115 gallons of water to grow enough wheat to bake a loaf of bread.
Source: Compton's Encyclopedia & World Book Encyclopedia
A single oak tree can release as much as 160 gallons (600 liters) of water daily through transpiration, a chemical process by which water in a plant's water transport system is released through tiny openings in the leaves.
Source: The New Book of Knowledge