2. Hello everybody. My name is Max.
In this Project I will :
tell you interesting facts about the water
show you some experiments with water made by
me and my parents at home
3. Facts about Water
The existence of water is essential for life on Earth
Water covers around 70% of the Earth’s surface
Pure water has no smell and no taste
Water has three different states, liquid, solid and gas
The word water usually refers to water in its liquid
state. The solid state of water is known as ice while the
gas state of water is known as steam or water vapor
The longest river in the world is the Nile River, it
reaches 6650 kilometers in length
4. Experiment # 1. Where does the
water go when a plant is watered?
Water is part of all plants
And you can see the movement of
water through the roots to the shoots
5. Experiment # 2. Do hot water and
cold water mix? Step 1
Some liquids float on top of
other liquids. Oil floats on
water. Alcohol floats on oil.
That's because these liquids
have different densities.
Whenever you put together
two liquids that don't
mix, the liquid that is less
dense will float on top of the
denser liquid. A drop of oil
weighs less than a drop of
water the same size. The oil is
less dense than the water, so
it rises to the top.
6. Experiment # 2. Do hot water and
cold water mix? Step 2
Let’s fill four identical
jars with food colouring
liquid. I was using red
and green colours for
this experiment.
7. Experiment # 2. Do hot water and
cold water mix? Step 3
Green colour for cold water
and red colour for hot water
8. Experiment # 2. Do hot water and
cold water mix? Step 4
Put the upside-down
green jar right on top of
the red jar and red jar
right on top green jar.
9. Experiment # 2. Do hot water and
cold water mix? Step 5
Hot water is less dense than
cold water. When you put the
two together with the hot
water on the bottom, the hot
water rises to the top, mixing
with the cold water along the
way and creating purple
water. When the cold water is
on the bottom, the hot water
doesn't have to rise: it's
already on top. The cold
green water stays on the
bottom and the hot red water
stays on top.
10. Experiment # 3. The Raisin Dance.
The raisins in this experiment sink
quickly when the density is greater than
the density of the water. The CO2 gas
bubbles attach themselves to the raisins,
which help make them less dense than
water. The raisins are able to float at the
surface carried by the carbon dioxide
bubbles. After a few seconds, the bubbles
break, and the raisins fall back to the
bottom. The process repeats itself over
and over. These carbon dioxide bubbles
are like the water wings you or your little
brother or sister wears when you need
help swimming. They help you float, just
like the carbon dioxide bubbles help the
raisins to float. When the bubbles burst
at the top, it's like the raisins took off
their wings and sunk back down to the
bottom.
