 
 
Hi, I am Jared and welcome to Fun Science 
Demos.
The big idea today is water. I know it
does not sound too interesting but
water is really important. This container
of water stands for
all the water that is on our planet. It
could be from
oceans-the water in the oceans-water in
lakes and rivers,
water that is in clouds coming down as
rain,
water that is in glaciers and ice caps,
water that is in streams and puddles.
All the water on our earth.
There is one problem. We cannot use
most of this water. All that water on our
planet,
we cannot use most of it. Why?
Through science we have discovered that most of the water on our earth,
it is in oceans, and that water is salty.
And that salt means we cannot use
this water.
Well I wonder then, how much of this water
can we actually use?
Let us take a look. I am going to carefully
pour
to show you how much of our water we can
actually use.
And that is it. All of this water
on our earth, and there is only this much
that we can actually use. Why can we use
it?
It does not have salt in it. Scientists call
it freshwater.
Scientists use graphs to tell a story. So
take a look in this graph
and it tells the same story I just told
you about all the water on our planet.
All of this blue stands for
all the salt water in our oceans and
look at this little piece of red.
That little piece of red, that is the
freshwater
that we have on our earth. Right here.
Scientists estimate
that about 97 percent of our water is in
oceans and it is salty.
That means only three percent is left
for our freshwater.
It seems like there is a whole lot more salt
water
than freshwater. So what does that mean?
That means that we need to take
really good care of this three percent of
freshwater. We should not be wasting it,
we should not be making it dirty so that
everybody can enjoy it.
Science is so cool.
Do not forget to check out some of our
links in the video description.
Thanks for watching.
 
 
