STD-2 – Science

Aman Day School
Sub :- Science
Assignment – II Semester
Std:-2nd Eng.Med
Q - 1. Tick ( ) the correct option:1. Air contains ____________.
a. water
c. water vapour
b. ice
d. All of these
2. The safest water for drinking is _____________.
a. river water
c. tap water
b. pond water
d. Sea water
3. The tap water is unsafe for drinking during __________.
a. summer season
c. rainy season
c. winter season
d. autumn season
4. We dig the following to get the underground water______________.
a. pond
c. lake
b. stream
d. well
5. The colour of shale is _________.
a. red
c. grey
b. pink
d. white
6. Which of the following is used for burning fire?
a. Coal
c. Marble
b. Shale
d. Granite
7. Sandstone is of colour ________ this.
a. brown
c. green
b. black
d. red
8. Which is a soft rock?
a. Granite
c. Sandstone
b. Coal
d. Marble
9. Which is the hardest rock known?
a. Marble
c. Sandstone
b. Diamond
d. Mica
10. The shape of the moon is like a __________.
a. plate
c. tumbler
b. ball
d. star
11. The sun is a ______.
a. large moon
c. star
b. shooting star
d. planet
12. The sun is a big ball of fire. It gives us __________.
a. light and sound
c. air and light
b. light and heat
d. heat and electricity
13. When the sun is right above our heads, the shadows are
a. Short
c. long
-------------------------------------------------------------------------------------------------------------R.T.O. Road , Commerce college campus, Godhra. Ph.No.02672-243700
Email :- [email protected] Facebook: Aman Day School –Godhra
Web Site : www.amandayschool.org
14.
15.
16.
17.
18.
19.
20.
b. Broad
d. Thin
In the morning sun rise in the _____________.
a. West
c. east
b. North
d. South
The sun is very far from us, so it looks__________.
a. Very huge
c. very small
b. Very beautiful
d. Very ugly
Steam is called __________.
a. Ice
c. liquid
b.Gas
d. All of these
Which of the following has a definite shape?
a. Solid
c. Liquid
b.Gas
d. None of these
Exercise and games make our body ____________.
a. Weak
c. inactive
b. Lazy
d. Healthy and strong
The air becomes impure because of ___________.
a. Dust particles
b. smoke
b. Carbon dioxide
d. All of these
Smoke comes from ___________.
a. factories
b. vehicles
b. fuels
d. All of them
Q.2. Fill in the blanks:
1. Moving air is called wind.
2. Strong winds cause a storm.
3. Oxygen supports in burning.
4. Smoke is given out when something is burnt.
5. Water from rivers has germs in it.
6. Collecting and storing is one way of saving water.
7. When water freezes, it changes into ice.
8. Granite is a hard rock.
9. Coal is used as a fuel in homes.
10. Diamond is used to cut glass.
11. The lead in pencils is made of graphite.
12. The sun is made up of hot burning gases.
13. The moon is the closest neighbour to the earth.
14. The moon does not have light of its own.
15. Life exists only on the earth.
16. The earth goes round the sun.
17. The day begins with sunrise.
18. Light travels in a straight line.
19. Sunlight helps plant to grow.
20. Shadows are shortest at noon.
Q.3. Write ‘True’ or ‘False’ against each statement:
1. Pure air harms our lungs.
2. The smoke makes air impure.
3. We cannot hold ice in our hands.
False
True
False
-------------------------------------------------------------------------------------------------------------R.T.O. Road , Commerce college campus, Godhra. Ph.No.02672-243700
Email :- [email protected] Facebook: Aman Day School –Godhra
Web Site : www.amandayschool.org
4. On cooling water vapour vanishes.
True
5. Clouds contain tiny droplets of water.
True
6. Living things do not grow.
False
7. Plants are natural living things.
True
8. All natural things are living things.
False
9. A river flows all the time.
True
10. Most rivers flow into ponds.
False
11. A hill is smaller than a mountain.
True
12. A mountain is a hot place.
False
13. A small part of the earth is covered by water.
False
14. A desert becomes cold during the day.
False
15. Soil is the outer most layer of Earth.
True
16. Wind has no direction and no speed.
False
17. Gentle wind is called storm.
False
19. Water freezes to form a gas.
False
20. Silkworm gives us silk.
True
Q.4. Give one word for each of the following:1. The slow moving air.
Breeze
2. The moving air.
Wind
3. Another name for weather vane.
Weather cock
4. The process of changing water vapour into water. Condensation
5. Disease-causing living beings.
Germs
6. A very large place covered with water, but which does not flow. Lake
7. A dry place with very little rain.
Desert
8. Something which flows into sea.
Rivers
9. It is formed when land rises. It is not very tall.
Hill
10. It salty and covers a large part of the earth with water. Ocean
11. A vast land without hills or mountains.
Plain
Q.5. What are the following things made of:
1. Spectacles that your grandfather wears.
glass
2. Door of your drawing room.
wood
3. Bucket of your bathroom.
plastic
4. Shoes you wear.
leather
5. A flower vase.
Porcelain
Q.6. Name the following:1. Rocks break up to form these.
Stones and pebble
2. Deep holes are dug to extract rocks.
mines
3. The hardest rock.
diamond
4. A soft rock used for writing.
graphite
5. A rock used for burning.
coal
6. The Taj Mahal is made up of this rock.
Marble
Q.7. Give one use of each of the following rocks:
1. Graphite
:
It is used in pencils
2. Diamond
:
It is used in jewellery
3. Sandstone
:
It is used in building forts.
4. Coal
:
It is used as fuel
5. Slate
:
It is used in making roofs.
-------------------------------------------------------------------------------------------------------------R.T.O. Road , Commerce college campus, Godhra. Ph.No.02672-243700
Email :- [email protected] Facebook: Aman Day School –Godhra
Web Site : www.amandayschool.org
Q.8. Match the following column:
Column A
1. Steam is a
2. Ice is a
3. Water is a
4. Rain comes from
5. Windmill
6. Impure air can
7. Car and buses give out
8. Wind has a definite
9. Slowly moving air
10. Windmill can grind
Column B
a. Liquid
b. Clouds
c. Solid
d. Gas
e. direction
f. corn
g. Is used to produce current
h. smoke
i. Is called breeze
j. Harm our lungs
Q.9. Answer the following question:1. What are the properties of air?
Ans. The properties of air are as follows:
 Air is a mixture of gases.
 Air takes up space.
 Air has weight.
 Air makes things to move.
2. What are storms? How are they harmful for us?
Ans. Strong wind is called storm. Storms can uproot trees and
poles. They can also make the boats and ships sink.
3. What does air contain? Explain.
Ans. Air is all around us. It contains many things such as:
 Air contains the dust particles.
 Air contains water vapour.
 Air has smoke and germs.
4. What should we do to keep the air clean?
Ans. Grow more green plants. Do not light fire works during the
festivals. Use public transports to go to nearby places.
5. What are the uses of water?
Ans. We use water for drinking, bathing, cleaning, washing
clothes, cooking, building house, irrigation and generating
electricity.
6. List the various sources of water?
Ans. Rain, river, pond, lake, stream.
7. What are the different methods of purifying water?
Ans. Boiling, water filter, and water purifier.
8. Why is it not safe to drink rain water?
Ans. Because it is impure and contains germs, dust and other
impurities.
9. What is the earth made up of?
Ans. The earth on which we live is a big ball of rocks and soil.
10. What is talcum powder made of?
Ans. Talc is used to make talcum powder.
11. What is diamond used for?
-------------------------------------------------------------------------------------------------------------R.T.O. Road , Commerce college campus, Godhra. Ph.No.02672-243700
Email :- [email protected] Facebook: Aman Day School –Godhra
Web Site : www.amandayschool.org
Ans. Diamond is used in jewellery. As it is the hardest rock, it is
also used to cut glass.
12. What things do we get from petroleum?
Ans. We get petrol, diesel, kerosene, Vaseline and wax from
petroleum.
13. What are minerals? Write names at least ten minerals.
Ans. Some useful things found in rocks are called minerals. Iron,
mica, coal, silver, copper, gold, petrol, diesel, zinc, sulphur.
14. What is sun and what does it give us?
Ans. The sun is a big ball of fire. It give us heat and light.
15. Why does the moon look different everyday?
Ans. Due to changes in the position of the earth, the moon
appears to changes its shape.
16. Why is the earth a unique planet?
Ans. The earth is a unique planet because it is the only planet
which supports life.
17. How are days and nights caused?
Ans. The earth rotates or spins on its axis. This rotation of the
earth causes day and night.
18. Why is sun important for us?
Ans. It gives us heat and light.
19. At what time of the day, shadows are longer?
Ans. Shadows are long in the morning and evening.
20. When are the shadows formed?
Ans. Shadows are formed when something comes in the way of
light.
============================================================================
-------------------------------------------------------------------------------------------------------------R.T.O. Road , Commerce college campus, Godhra. Ph.No.02672-243700
Email :- [email protected] Facebook: Aman Day School –Godhra
Web Site : www.amandayschool.org