Chapter 10 Science
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Water both on and inside Earth
What is the water cycle?
The continuous circulation of water from Earth to the atmosphere and back.
What helps regulate the climates of the earth?
What is the life-sustaining substance that helps make earth suitable for living?
What are some uses for water?
We drink it, wash in it, and play in it. We use it for transportation and recreation.
Why is earth sometimes refered to as the blue planet?
Because of its great amount of water.
How much percent of the earth's surface is covered by water?
70%, no other planet has any liquid water on its surface!
To mix with another substance forming a solution
A substance capable of dissolving another substance
What gives water its unique properties?
The atoms; One oxygen combined with two hydrogen
Why do water molecules stick to one another and to many other substances?
Because opposites attract, the hydrogen atoms and the oxygen atoms attract to another
What are some properties of water?
- 1)The ability to dissolve other substances to form solutions makes it a great solvent, and useful for washing and cooking.
- 2) Density is another property of water
What is Density?
The measure of how compact matter is
When is water the most dense?
In its liquid state
How many states can water exist in at one time?
- Three; example the Artic Ocean
- Icebergs are in solid state
- Ocean water is liquid state
- Water vapors are in the air
The process by which water constantly circulates throughout the earth and its atmosphere
The change of a liquid into a gas
The evaporation of excess water from a plant
- The change of a gas into a liquid
- Falls as precipitation like rain or mist
- Forms clouds
- A form of water that falls from the atmosphere to earth
- (snow, sleet or hail)
- The water that can be seen on the surface of the earth
- (Rivers, lakes, and oceans)
The water within the earth
A mass of rock or sediment the stores groundwater
A spring; groundwater trapped between layers of rock that flows to the surface through an opening
What is most of the water on Earth?
What needs freshwater to survive?
People need freshwater for drinking, cooking, washing, and irrigating crops. Household plants need freshwater to grow.
What is water from an Artesian well often called?
Fossil water because it comes from the ground
The place where a river meets an ocean or sea
The amount of salt that is dissolved into water
A mixture of saltwater and freshwater
Name some things that make their home in and Estuary?
Heron, crabs and sea lions
Why is it important to protect estuaries?
To protect the animals and plants that live there
An area of land from which water draints into a particular water system
What is a river basin
A large watershed
What can affect the direction and quality of water in a watershed?
- Natural forces such as earthquakes and volcanic acitivity. These can change surrounding land formations.
- Floods and droughts can also have serious effects on watersheds. Floods can change the course of streams, and droughts can cause part of the watershed to dry out.
How is water necessary for human survival?
It cools and refreshes us.
How can water be deadly?
Ocean waves are powerful and can be destructive
How can people affect watersheds carelessly?
By dumping chemicals, fertilizers, or waste chemicals into a body of water. This causes pollution, it will affect the ground water supply, and it can affect the plant and animal life.
How does pollution affect people?
It can make their water supply dangerous to drink
What does an Environmental scientist do?
Studies insects and larvae that live in streams to monitor the health of streams. They can track the path of pollution.
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