Water, Water Everywhere
|Seventy percent of Earth is covered by ocean.
Do you know how much of Earth's water is in the ocean?
||Highlight the box below to see the answer.
97% of Earth's water is found in oceans.
of the Earth’s
water is in the ocean. It is salty; therefore, it is not useful for us
to drink or grow crops. Only about 3% of the Earth’s water is fresh,
and much of that is trapped in icecaps and glaciers. Some is underground.
Some is in the lakes and streams around us. Only a very small portion
water is fresh and available to us.
1-liter beaker (If you do not
have a beaker, use a large jar and a measuring cup.)
2 small jars
Measuring cup that measures in
Small graduated cylinder or spoon
(to measure one ml.)
Measure exactly one liter (1000
ml) of water and pour it into one jar. This water will represent
all the water on Earth.
- Determine 1% of the water
in the jar (hint 1000
* .01). Measure that amount and put it in a jar. This
will represent the water in the ground, lakes, streams,
Now you need to put 2.2% more water in the jar. How many ml of water
would that be
(hint 1000 * .022). This will represent the frozen ice
Measure that amount put it in the other jar.
- The water
remaining in the beaker represents the ocean water on Earth.
You have just made a very simple model of how water is distributed on
a short paragraph explaining your model.
for your model.