Vocab
Oceans
Ground Water/Fresh Water
Other
100
what is a watershed?
A region of land that drains into a river
100
What percent of Earth's surface do the oceans cover?
71%
100
List the types of water that are considered fresh surface water.
rivers, streams, lakes, ice
100
What is an aqueduct?
An aqueduct is water carried a long distance through a system of channels, pipes, and tunnels.
200
The layer of rock and soil that groundwater flows through is an _____________.
aquifer
200
How do oceans become salty?
Runoff! Runoff is rainwater that flows over the land without sinking into the soil. It collects salt and other minerals to the sea.
200
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.
200
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!
300
The process of water vapor changing to liquid water is ______________.
condensation
300
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.
300
A place where water is collected and stored is called what?
Reservoir.
300
Fresh water is supplied to farms and fields via what?
Irrigation.
400
The top level of groundwater in an aquifer is the ___________.
water table
400
Explain how evaporation in oceans can affect salinty.
The more evaporation the greater the salinity. The less the evaporation the lower the salinity.
400
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.
400
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.
500
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.
500
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.
500
How much of Earth's fresh water is in ice sheets and glaciers?
two-thirds of the 3% of fresh water on Earth.
500
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.