what is a watershed?
What percent of Earth's surface do the oceans cover?
71%
What is an aqueduct?
An aqueduct is water carried a long distance through a system of channels, pipes, and tunnels.
How do oceans become salty?
The careful use of a natural resource is called what? Give me two examples of ways we can use water wisely.
Conservation!
Conserve water by taking shorter showers and turning water off while you brush your teeth.
what is groundwater and where can I find it?
Groundwater is water that collects in spaces and cracks in rocks and soil underground. If you dig deep enough even in a desert, you can eventually reach groundwater!
What is desalination? Explain the process.
Salt removed from salt water to make fresh water is a process called desalination.
Ocean water is heated, causing the water to evaporate, leaving the salt behind. The water vapor that forms is cooled into it condenses back into fresh water.
Reservoir.
Fresh water is supplied to farms and fields via what?
Irrigation.
Explain how evaporation in oceans can affect salinty.
The more evaporation the greater the salinity. The less the evaporation the lower the salinity.
Because of possible pollutants, water is treated before use. Name two ways that most communities treat water before it comes into your home.
Water passes through filters that remove small particles. Many communities add chlorine to the water to kill bacteria. Some communties also add flouride to help your teeth.
Is Northern or Southern California more dependent on fresh water from outside sources?
Southern California. We have much less rain than Northern California! We get most of our water from the Colorado River.
What is water reclamation? Give an example.
Water reclamation is the recycling of waste water so it can be used again. For example, waste water from homes being used to instead clean cars and water lawns.
Runoff carries salts and other minerals to _______________________. Eventually the rivers empty into _____________, bringing the salts and other minerals with them.
1 - streams and rivers.
2 - Oceans and seas.
How much of Earth's fresh water is in ice sheets and glaciers?
if you run out of water in your well, what can you guess happened?
The level of the water in the water table has sunk. It went below where the well reaches.