Science Std. IV Chapter 2

2. Adaptations for Survival in Plants

A. Answer the following questions.
1. What is habitat?
2. Name the factors which influence the adaptations developed by plants.
3. What are the adaptations of plants that grow in plains?
4. How is a coconut tree adapted to grow in coastal areas?
5. What are adaptations?
6. Name the two categories into which plants have been divided on the basis of
    their habitat.
7. Give adaptations and examples of plants growing in:
    (a) Hills      (b) Deserts      (c) Marshy places
8. How is water lettuce adapted to grow in water?
9. What are underwater plants? How are they adapted to grow under water?
10. Name some plants that do not contain chlorophyll.
11. How is the leaf of a pitcher plant modified to capture insects?

B. Fill in the blanks.
1. Plants that grow on land are known as __________________ plants.
2. A plant adapts itself according to the climatic conditions of its _________________.
3. The trees growing in ___________________ have many branches.
4. Floating plants are ___________________ and ___________________ to
    facilitate floating.
5. In a __________________ plant, the leaf is modified into a pitcher-like structure.
6. Mushroom is a non-green plant that lacks ____________________.

C. Tick the correct answer.
1. Which of these is an example of underwater plants?
    (a) Lotus    (b) Water hyacinth    (c) Hydrilla
2. Which of these plants absorbs food from other sources?
    (a) Mould    (b) Water Lettuce    (c) Cactus
3. Which of these plants has leaves that are waxy and needle-like?
    (a) Coconut   (b) Neem    (c) Cedar
4. Which of these plants have long, hollow, light and flexible stem?
    (a) Underwater plants    (b) Fixed plants    (c) Floating plants.
5. Which of these grows in marshy areas?
    (a) Teak   (b) Cedar tree   (c) Rubber   (d) Mangrove tree
6. Hydrilla is an/a
    (a) underwater plant   (b) floating plant   (c) fixed plant   (d) insectivorous plant
7. Which of these is known as an insectivorous plant?
    (a) Water lily   (b) Pitcher plant   (c) Hydrilla    (d) Cactus

D. Complete the following web charts.

E. Find out the names of ten plants in the given grid. The names may read forward,
     backward and across.

F. Answer in one word or a few words.
1. Trees which shed their leaves in autumn
2. Plants that grow on land

G. Define
1. Insectivorous plants.

Science Std IV Chapter 9

Chapter 9

More about Clothes

A. Fill in the blanks.
1. Synthetic fibres do not absorb ________________ as they are _________________.
2. _______________ and _______________ wear white clothes.
3. Our clothes form a protective layer between _________________ and our body.
4. The traditional dress of _______________ consists of mundu and _______________.
5. A raincoat is made of ________________ material, thereby protecting us from rain.
6. Keeping mothballs or dried neem leaves in woollen clothes keep insects like
    _________________ and _________________ away.

B. Answer the following questions.
1. What is the need to wear clothes?
2. What are synthetic fibres? Give examples.
3. How is natural fibre different from synthetic fibre?
4. Write a note on 'clothes and culture'.
5. How can we take care of our clothes?
6. Why do people prefer wearing cotton clothes during summer?

C. Match the following.
          Column A                              Column B
1. Flax                                    (a) Jammu and Kashmir
2. Phiran                                 (b) Synthetic fibre
3. Rayon                                 (c) Korea
4. Hanbok                               (d) Plant fibre

D. State whether the following statements are true or false.
1. Synthetic fibres are obtained from nature.
2. Cloth is made from fibres.
3. Our clothes do not protect us from insect bites.
4. Clothes should be washed properly with a good quality detergent.
5. Kimono is the national dress of Korea.
6. Many fabrics when twisted together make yarn.
7. Flax and hemp are animal fibres.
8. Coloured clothes should be dried in shade.
9. Synthetic fibres are man-made fibres.
10. Natural fibres are water-proof fibres.

E. Tick the correct answer.
1. Which of these fibres is obtained from plants?
    (a) Lycra      (b) Silk         (c) Hemp
2. Which of these is the traditional dress of Korea?
    (a) Hanbok     (b) Kimono     (c) Phiran
3. Which of these does not absorb sweat?
    (a) Cotton      (b) Lycra     (c) Wool
4. Which of these clothes are very delicate?
    (a) Cotton clothes  (b) Nylon clothes   (c) Silk Clothes
5. Our clothes protect us from
    (a) dust     (b) insect bites    (c) dust and insect bites.
6. Which of these is the traditional dress of Jammu and Kashmir?
    (a) Kimono     (b) Sari    (c) Hanbok    (d) Phiran

F. Unscramble the given words.
1. EJTU     2. CALRY     3. OTCNOT     4. NAYRO    5. LOWOELN   6. MEHP

G. Complete the following web charts.
1. 

2. 

H. Define
1. Natural fibres     2. Synthetic fibres    3. Waterproof material

I. Give reason
1. People prefer wearing cotton clothes during summer.
2. We should not wear synthetic clothes while working in kitchen.

J. Answer in one word.

1. National dress of women of India.
2. Dress made up of waterproof material worn in rainy season.

I. Give two examples of each.
1. Types of fibres.

Science Std IV Chapter 5

5. More About Insects

A. Name the following
1. A useful insect
2. A social insect
3. A wingless insect
4. An insect having sucking type of mouth parts
5. Hard outer covering of an insect
6. Chemicals used to destroy harmful insects
7. The chest of an insect.
8. Thing we get from silkworm.
9. This helps an insect to detect vibration, odour and sound.
10. Diseases spread by insects.
11. Harmful insects.

B. Answer the following questions.
1. What is the function of exoskeleton?
2. What do insects have on their head?
3. What are the legs of insects adapted to?
4. Which part of the body contains the heart and other organ systems of an insect?
5. What is the purpose of living together in colonies?
6. What are the four stages in the life cycle of a butterfly? Explain with a diagram.
7. Give four uses of insects?
8. How can we get rid of harmful insects?
9. What is the function of thorax of an insect.
10. How do composite eyes save insects from their enemies?
11. Name any two insects eaten by humans.
12. Name any two diseases spread by insects.

C. Fill in the blanks.
1. The exoskeleton provides the necessary _________________ as well as
    _____________________ to the body of an insect.
2. Insects have ___________________ eyes that have thousands of 
    _____________________.
3. The series of changes through which an organism passes from birth to death is
    called its ___________________.
4. Some insects help in ____________________ of seeds of plants.
5. Insects do not have ____________________.
6. Insects breathe through small openings called ______________________.
7. The chest of an insect is called ____________________.
8. We get __________________ and ___________________ from beehive.

D. Tick the correct answer.
1. Which of these is without a backbone?
    (a) Parrot      (b) Mosquito     (c) Snake
2. Insects have _____________________ pairs of legs.
    (a) three         (b) two              (c) four
3. Which of these help(s) an insect to detect odour, vibrations and sounds?
    (a) Wings         (b) Composite eyes     (c) Antennae
4. The caterpillar spins a cocoon around itself and is called a
    (a) larva             (b) pupa           (c) butterfly
5. Which of these is made of beeswax?
    (a) Crayon          (b) Pencil        (c) Pen
6. Which of these is/are absent in insects?
    (a) Muscles      (b) Skeleton     (c) Nerves

E. State whether the following statements are true or false.
1. Flea is a wingless insect.
2. Insects do not have a nose.
3. Cockroaches have four stages of development.
4. Insects have three pairs of legs.
5. Butterflies and moths have chewing type of mouthpart.

F. Write a short note on 'colony of insects'.

G. Find out seven words related to this chapter in the given grid. The words may
     read forward, backward and across.

H. Complete the following web chart.




























I. Define
1. exoskeleton    2. spiracles    3.life cycle

J. Give reasons

1. Honeybee is a useful insect.
2. Some insects stay together in colonies.