Home work - 1
OUR SOLAR SYSTEM, OUR EARTH AND LIVING WORLD
Q.1. Who am
I?
(a) I turn around myself, around a planet and also around a star.
- Moon
(b) No other planet has a living world like mine.
- Earth
(c) You can see me from the earth but the lighted part of me that you see changes every day.
- moon
Q.2. Answer
the following questions:
(a) What is
the equator?
Answer: An imaginary circle present between the North and the South pole is called the equator.
(b) Which planet is nearest to the sun?
Answer: Mercury is nearest planet to the sun.
Q.3. Fill in
the blanks:
(a) The motion of the earth around itself is called rotation.
(b) The motion of the earth around the sun is called revolution.
(c) The rotation of the earth gives rise to day and night.
Q.4. In the
following sentences, underline the words that refer to landforms:
(a) Anil lives at the foot of a hill.
(b) Ria lives in a plateau region.
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Home work - 2
ENVIRONMENTAL BALANCE
Q.1. Use
your brain power!
Make up a
food chain:
Frog, kite,
worm, snake, grass.
Answer: Grass → worm → frog → snake → kite
Q.2. True or
False?
(a)
Microorganisms form a part of the environment. - True
(b) It is necessary to maintain biodiversity. - True
(c) A grasshopper eats birds. - False
Q.3. Can you Tell?
(1) What is the deer's food?
Answer: Deer is a herbivorous animal. It eats grass. In search of green grass, they move about in the jungles. It also feeds on leaves and smaller herbs and shrubs.
(2) What is the food of the tiger?
Answer: Tiger is a carnivorous animal. It feeds by hunting on small prey. Flesh of these animals is food for the tiger.
Q.4. Answer the following questions:
1. What substances in the soil are useful for the growth of plants?
Answer: (1) Plants require water, minerals and other substances in the soil for their growth. (2) The substances formed due to decomposition of dead and decaying plant and animal material are very useful for plants. (3) These substances help in the rapid growth of plants.
2. Who eats birds?
Answer: Smaller birds are killed and eaten by bigger birds. Cats and snakes may also hunt the smaller birds. Man, also kills birds for food.
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Home work - 3
FOOD FOR ALL
Q.1. Find and
correct the wrong statements:
(a) There
is only one way of farming.
Answer: False. (There are many ways of farming.)
(b) India is an agricultural country
Answer: True.
(c) Use of
improved seeds does not lead to higher yields.
Answer: False. (Use of improved seeds leads to higher yields.)
Q.2. Match
the following:
'A'
Group Answer
'B' Group
(1) Grain
stored in damp place ( ) (a) Prevents growth
of fungus
(2) Grain
stored in dry
air ( ) (b) P Preserves insect infestations
(3) Adding
proper chemicals to the stored grains. ( ) (c) Fungus attack
Ans. (1) Grain stored in damp place - Fungus attack
(2) Grain stored in dry
air - Prevents growth of fungus
(3) Adding proper
chemicals to the stored grains - Preserves insect infestations.
4. Answer
the following questions:
(a) What
are the advantages of using improved seeds?
Answer: (1) Improved seeds have higher yield.
(2) These seeds resist
pest attacks.
(3) They grow well and
become ripe for harvest in a shorter period of time. (4) Some seeds can give
high yield in low water supply too.
(b) Names of two varieties of improved seeds of Jowar.
Answer:
(c)
Describe the 'drip irrigation' method.
Answer:
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Home work - 4
METHODS OF PRESERVING FOOD
Q.1. Find and correct the wrong statements:
(a) When something is boiled, the microorganisms in it are destroyed.
Answer:
(b) Our food does not get spoiled when microorganisms begin to grow in it.
Answer:
(c) Foodstuffs dried during summer season cannot be used for the rest of the year.
Answer:
(d) Foodstuffs get warmth when put in a fridge.
Answer:
Q.2. Answer the following questions:
(a) What are the different methods of preserving food?
Answer:
(b) Find out the names of different spices. Also find out which part of their plant they are.
Answer:
(c) Which foodstuffs spoil most quickly?
Answer:
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Home work -
Water
Q.1. Answer whether the following statements are True or False. If false, rewrite them after correcting:
(a) We get rainwater throughout the year.
Answer:-
(b) During a famine, the government moves people and animals temporarily to safe places.
Answer:-
Q.2. Answer the following questions:
a) Which are the three states of water?
Answer:
b) How should roads and footpaths be built to make rainwater seep into the ground?
Answer:
c) What conditions prevail during a famine?
Answer:
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