The Earth's Water Supply
Of all the water on Earth, only a small amount is available for us to use. It's true!
97.2% of the Earth's water supply is salt water.
Only 2.8% is fresh water!
Of the total supply of water on Earth,
0.6% is groundwater (we can use some of this water)
0.01% is in lakes and streams (we can use some of this water)
2.2% is in glaciers and icecaps
0.001% is water vapor
It's important that we all work to save water. About half the water we use each year is used outdoors - watering the garden and lawn, filling the swimming pool and washing the car. Ways to reduce your water use outside include using a shut-off faucet when washing the car and landscaping with plants that use less water.
- Brush your teeth? - 2 to 5 gallons
- Wash the car? - 50 gallons
- Use the dishwasher? - 8 to 15 gallons
- Flush the toilet? - 1.5 to 4 gallons (each flush)
- Take a shower or bath? - 17 to 24 gallons
- Run the washing machine? - 35 to 50 gallons (each load)
The Water Cycle for Schools and Students: Advanced students
The water cycle describes how Earth's water is not only always changing forms, between liquid (rain), solid (ice), and gas (vapor), but also moving on, above, and in the Earth. This process is always happening everywhere.
Please click on center of photo to enlarge Image