ARMY PUBLIC SCHOOL, GOLCONDA
SA-2 ( 2015-16)
(REVISION)
SUBJECT : EVS CLASS : IV
LESSON : Water /
Water changes
I. Name the following:
1. Who marched to Dandi with his followers to
protest against Salt Tax?
2. Salt can be removed from sea water by a
process called __________.
3. Water changes it’s form from Liquid to Gas. This is called _________ vapour.
4. Alternate evaporation and condensation
controls the ___________.
II. Give Reasons:
1. When you place a cool plate near the spout of
hot kettle, you find tiny
droplets of water on the surface of the
plate. Why is it so?
2. When wet clothes are put on, on a clothline,
after a while the clothes are dry.
Where does the water vanish?
3.
From where does the dew drop on grass and leaf in the early morning come
from?
4. When water is kept in the freezer of a
refrigerator, it changes into ice. The
same ice when kept in room temperature, it
changes into water. Why is it
so?
III
.Pick the odd one out:
1.
Solid, Liquid, Gas, Coal.
2. Distillation, Desalinization, Sedimentation,
Filteration.
3. Jaundice, Typhoid, Cholera, Cancer
4.
Evaporation, Distillation, Condensation,
Precipitation.
5. Dams, Reservoirs, Canals, Rivers.
6. Pacific, Atlantic Indian, Cauvery.
7. Well, Hand pump, Dam, Tube well.
IV.
Answer the following questions:
1.
Why is earth
called a Blue planet?
2.
What are
Glaciers?
3.
Give examples
of Perennial rivers.
4.
What are the
three forms of water?
5.
What is
evaporation?
6.
What is condensation?
V. Diagram on water cycle
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