Experiments with water priya jha

3. Experiments with
water
Prepared by Priya Jha
KV R K PURAM SEC-2(2
ND
SHIFT)

4. 3 R’s to save water

5. Properties of water
•Water is colourless, tasteless and
odourless.
•Water is liquid at room temperature,Ice as
a solid and Steam as vapour.
•Density of water is 1000 kg/cc.
•Water is the Universal Solvent.
•Water freeze at zero degree Celsius and
boil at 100 degree Celsius.

7. SINK OR FLOAT

8. FLOAT OR SINK
•Most of the objects float if it is Lighter in
weight or Density is less than water.
•Most of the objects float if it is Heavier in
weight or Density is more than water.
•Density is Mass per unit volume.
•Density of water is 1000 kg/meter cube.
•Only those objects float which can
displace the water as their weight.

9. Assessments
Group the following
objects.
A marble
An eraser
Wood
A pencil
A key
A coin
Cork
Lid of a bottle
Objects
that float
Objects
that sink

11. Why is the ‘Dead Sea’ is dead?
All oceans and seas have salty water.
The saltiest of all is the Dead Sea.
There are no life in this sea due to its salinity.
Every things dropped in it certainly float whether know
swimming or not due to salinity of the water of the sea.

12. Assessments
In the given picture a
person is floating on
water in a lake. What is
that lake called? How
he can float on water?
(or)
Why do a person who
cannot swim, will not
drown in Dead sea?

14. Location of Dead sea
It is located in Jordan (Israel).

15. Mark [✓] for the things that float. Mark [✕] for
those that sink.
I guessed, before
I did it
I saw, when I
did it
(a) Empty bowl (katori)
(b) After putting in 6-7 small
pebbles, one-by-one
Iron nail or pin
Matchstick
(a) Empty plastic bottle with its lid
closed
(b) bottle half-filled with water
(c) Bottle full of water

16. Find out from the other groups which things floated and which
sank in the water?
After doing the experiment, fill in the blanks.
1. The iron nail ______ in water but the katori ______. I think
this happened because _________________________________
2. The empty plastic bottle ______ on water. The bottle filled
with water ______ because ______________________________

18. DISSOLVE OR NOT DISSOLVE

19. Water is the Universal Solvent.
This property of water is used for
cooking, preparing medicine, in
industry etc.

20. Assessments
•Encircle the things
that dissolve in
water.
•Sugar, Lemon juice,
Oil, Fruit juice, Pepsi,
Salt, Chalk powder,
Mud, Ghee, Mishri
(sugar lumps), Milk.
•Group the following
into which are
soluble in water and
which are not
soluble in water.
•Blood, Ink, Curd,
Ghee, Wax, Wheat
flour, Sugar, Salt,
Pencil waste, Milk

21. •What things do you put in water to make
tea? Which of those things dissolves in
water?
•You have been given some mishri pieces
(lumps of sugar). Suggest some ways to
dissolve them quickly.

22. RACING DROPS
•Ayesha put two drops of oil on
the lid of her tiffin box. Next to
that she put two drops of water
and two drops of sugar
solution. She tilted the lid. She
saw some drops slid down
quickly, while some were left
behind.
•i) Which drops slid
down faster?
•ii) Which are slowest?
Why?

23. EVAPORATION
Water turn into water vapour at higher
temperature even at room temperature. In
this process water return back in to water
cycle in atmosphere.
You have washed your handkerchief and
you want to dry it quickly. What all can you
do?

24. Assessments
Look at the picture
and write how salt
can be obtained from
sea water.

25. DANDI YATRA

26. Assessments
Mahatma Gandhi was picking up salt in the
picture. In which march (or) movement he
did it? Why did he undertake this march?