Earth is the only planet with large amounts of water. most importantly, water is vital for life, water is also an important natural resource.
Why is water important?
100
When waste water or other material is added to water so that it is harmful to organisms that use it or live in it water pollution occurs point source pollution comes from one specific site nine. Source pollution comes from many small sources of this with more difficult to control
what threatens fresh water quality?
100
The increase in volume that results from an increase in temperature is called thermal expansion
What is thermal expansion?
100
About 97% of earths water is salty which leaves only 3% as freshwater over 2/3 of earths freshwater is frozen as ice and snow
what is the problem if there is lots of water?
100
Almost all of the energy on earth is transmitted from the Sun by radiation
where does radiation occur on earth?
200
Earths fresh liquid water is found as surface water and ground water. ground water is found under earths surface.
where do we get fresh water?
200
we live in the troposphere.
which layer of the atmosphere do we live in?
200
Heat is the energy that is transferred between objects that are at different temperatures.
what is heat?
200
what’re quality is a measure of how clean or polluted water is. water supply is the availability of water.
what are water quality and supply?
200
There are two main gases in the atmosphere first nitrogen 78% second oxygen 21% all other gases make up the other 1%
What gasses are in the atmosphere?
300
as a result, public water supplies are closely monitored so that any problem can be fixed quickly.
Who monitors and protects our water quality?
300
The ozone layer is when ozone molecules absorb solar radiation.
What is the ozone layer?
300
This is because the land warms up at A faster rate than the water and air do
why can the temperatures of land, air, and water differ?
300
Water that is suitable to drink is called potable water. Once water is used it becomes waste water.
how is water treated for human use?
300
The movement of air caused by differences in air pressure is called wind air moves from areas of higher pressure toward areas of lower pressure.
What causes wind?
400
Engineers developed a way to transfer and store large amounts of water are human can now live in places where freshwater supplied by water pipes and other chance structure
how does water get to the Faucet?
400
The relationship between air pressure and air density is that they both increase in proportion.
what is the relationship between air density and air pressure?
400
Air pressure is the measure of the force with which air molecules push on an area of a surface
how do pressure and temperature change in the atmosphere?
400
Growing urban populations place a greater demand on water supplies. efforts to increase water supply can effect the environment.
how do efforts to supply water to humans affect the environment?
400
These wind systems occur at or near earth surface and are called global winds. calm areas include the doldrums and the horse latitudes.
What are examples of global winds?
500
Use of water can cause water shortages dry or leaking water pipes can also cause water shortages
What threatens our water supply?
500
The mixture of gases that surrounds earth is the atmosphere.
what is earths atmosphere?
500
Temperature is a measure of the average kinetic energy of particles thermal energy is the total kinetic energy of particles
how are energy and temperature related?
500
Before there were scientific method of testing water, people can only look at water taste it and smell it to check it’s quality.
how is water quality measured?
500
the apparent curving of the path of a moving object form an otherwise straight path due to its earths rotation is called coriolis effect.