1. *
LEVELS

2. Sunlit Zone 0-600 feet * In the sunlit
zone the water is very warm because
that is where the sun hits. Most of the
plants and animals live in the sunlit zone.
This is were you will find most sharks
although there is some sharks that live
near the ocean floor.
Twilight Zone 600-3,300 feet * The
twilight zone temperature can be as low
as 41 degrees F. Because there is less
light there than in the sunlit zone.
Dark Zone 3,300-13,200 feet * In the
dark zone the temperature is about 35
degrees F. There is not so much food in
this zone.
Abyss 13,200-19,800 feet * In this layer
the mud is made from the skeletons of
other small sea animals. The mud can be
more than a mile thick.
Trenches over 19,800 feet * Only animals
that are adapted to the freezing water
can survive in this layer.

4. 1. Most of the earth's surface consists of water; there is much more water than there
is land.
2. Water can not only be found on the surface, but also in the ground and in the air.
3. There is the same amount of water on earth as there was when the earth was
formed. The water that came from your faucet could contain molecules that
Neanderthals drank…
4. The overall amount of water on our planet has remained the same for two billion
years.
5. There are two kinds of water; salt water and freshwater. Salt water contains great
amounts of salt, whereas freshwater has a dissolved salt concentration of less than
1%. Only freshwater can be applied as drinking water.
6. Water consists of three atoms, 2 Hydrogen atoms and an Oxygen atom, that are
bond together due to electrical charges.
7. The weight of a water molecule depends on the number of moles present, as it is
18 grams per mole.
8. Water moves around the earth in a water cycle. The water cycle has five parts:
evaporation, condensation, precipitation, infiltration and surface run-off.
9. In a 100-year period, a water molecule spends 98 years in the ocean, 20 months as
ice, about 2 weeks in lakes and rivers, and less than a week in the atmosphere.
10. Groundwater can take a human lifetime just to traverse a mile.
11. Most of the earth's surface water is permanently frozen or salty.
12. Water regulates the earth's temperature.

5. 13. Water freezes at zero degrees Celcius.
14. Water vaporizes at a hundred degrees Celcius.
15. Water is the only substance that is found naturally on earth
in three forms: liquid, gas, solid.
16. If water changes phase its physical appearance changes due
to parting of water molecules. In the solid phase the water
molecules are close together and in the gaseous phase they are
the furthest apart.
17. Frozen water is 9% lighter than water, which is why ice
floats on water.
18. A litre of water weighs 1.01 kilograms.
19. It doesn't take much salt to make water "salty." If onethousandth (or more) of the weight of water is from salt, then
the water is "saline."
20. Saline water can be desalinated for use as drinking water by
going through a process to remove the salt from the water.
21. When water contains a lot of calcium and magnesium, it is
called hard water. Hard water is not suited for all purposes
water is normally used for.
22. To determine water quality certified agencies take samples
that are tested in a laboratory. The samples are tested on
various factors, to determine if they suffice water quality
standards.
23. Each country has its own water quality standards that
determine to which degree water should be purified, depending

6. 9. The total amount of water in the body of an average adult is
37 litres.
10. Human brains are 75% water.
11. Human bones are 25% water.
12. Human blood is 83% water.
13. 75% of a chicken is water.
14. 80% of a pineapple is water.
15. 95% of a tomato is water.
16. 70% of an elephant is water.
17. Each day the sun evaporates a trillion tons of water.
18. A single tree will give off 265 liters (70 gallons) of water per
day in evaporation.
19. An acre of corn will give off 15,000 litres (4,000 gallons) of
water per day in evaporation.
20. A small drip from a faucet can waste as much as 75 litres of
water a day.
21. The amount of water we deliver on a hot summer day, 308
million litres (80 million gallons), could fill 1.28 billion cups of
coffee.

7. *