PLANTS AROUND US EXERCISE QA FOR STD 3

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CHAPTER 2 : PLANTS AROUND US

EXERCISE QUESTIONS AND ANSWERS

A.     FILL IN THE BLANKS.

1.      ________ carries all the parts of the shoot in a plant.

Ans: Stem

2.      The strong woody stem of a tree is called the ________.

Ans: Trunk

3.      A _______ has a thin and green stem.

Ans: Herb

4.      Muskmelon and grass are examples of ________.

Ans: Creepers

5.      ________ is an example of a climber type plant.

Ans: Grapes / Money plant / Peas (any one)

B.      MATCH THE FOLLOWING:

1.      Tree                                  a. Bitter gourd

2.      Shrub                               b. Tomato

3.      Herb                                 c. Pea plant

4.      Climber                           d. Mango

5.      Creeper                           e. Rose

      Ans:

1.      Tree                                d. Mango tree

2.      Shrub                              e. Rose

3.      Herb                               b. Tomato

4.      Climber                          c. Pea plant

5.      Creeper                          a. bitter gourd

 

C.      TICK THE CORRECT OPTION.

 

1.      The plants, that give shade to humans and animals, are called -

(a)   Shrubs        (b) Trees          (c) Herbs        (d) Creepers

      Ans: Trees

2.      The part of a plant, that stores seeds, is known as –

(a)   Fruit             (b) Leaf          (c) Stem           (d) Root

      Ans: Fruit

3.      The plants, that look like bushes with many branches, are known as –

(a)   Climbers       (b)  Herbs       (c) Trees       (d) Shrubs

       Ans: Shrubs

D.     ANSWER THE FOLLOWING QUESTIONS IN BRIEF.

 

1.      State the function of a leaf.

Ans: The leaf makes food for the plant.

2.      Write the role of roots of a tree.

Ans: i) The root fixes the tree in the soil.

        ii) Roots of trees also absorb water from deeper parts of the soil.

3.      What type of stem do climbers have?

Ans: The climbers have very weak and thin stems.

4.      State the difference between the stem of a shrub and a herb.

Ans: i) The stem of a shrub is woody. But, the stem of a herb is not woody and they are green in colour.

        ii) The stem of shrub is stronger than that of the herb.

E.      ANSWER THE FOLLOWING QUESTIONS.

 

1.      Draw and label different parts of a plant.

Ans:

 

2.      Write any three features of trees.

Ans: i) Trees have woody and strong stem.

        ii) Their roots grow very deep into the soil.

       iii) Trees live for many years.

 

3.      Write the difference between a tomato plant and grass.

Ans:

Tomato plant	Grass
Tomato plant is a herb.	Grass is a creeper.
They have thin, non-woody stems.	They have thin and weak stems.
They stand straight.	They creep on the ground.
They produce fruits.	They do not produce fruits.

 

4.      Why do some plants creep on the ground?

Ans: i) Some plants creep on the ground because they have very thin and weak stems.

        ii) So, they spread their branches on the ground itself.

STD-4, CHAPTER-1: MY BODY, EXERCISE QUESTION ANSWERS

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CHAPTER 1 : MY BODY

EXERCISE QUESTIONS AND ANSWERS

A.     FILL IN THE BLANKS.

1.      The body organs that cannot be seen from outside are called_____ organs.

Ans: Internal

2.      Flat teeth are in the _______ of the mouth.

Ans: Front

3.      Tongue is used for _____ and ______.

Ans: Tasting and speaking.

4.      Saliva is secreted by _________.

Ans: Salivary glands

5.      Flies can transfer _______ to uncovered food.

Ans: Germs

B.      MATCH THE FOLLOWING:

1.      Milk teeth                             (a) Absorption of water

2.      Large intestine                     (b) Absorption of digested food

3.      Permanent teeth                 (c) Undigested waste is collected

4.      Rectum                                  (d) Thirty two

5.      Small Intestine                     (e) Twenty

      Ans:

1.      Milk teeth                             (e) Twenty

2.      Large intestine                     (a) Absorption of water

3.      Permanent teeth                 (d) Thirty two

4.      Rectum                                  (c) Undigested waste is collected

5.      Small Intestine                     (b) Absorption of digested food

 

C.      TICK THE CORRECT OPTION.

1.      The teeth, used to tear food into pieces, are known as -

(a)   Incisors        (b) Canines          (c) Molars        (d) Premolars

      Ans: Canines

2.      Rita’s mother is thirty two years old. She is likely to have –

(a)   20 permanent teeth                       (b) 20 temporary teeth

(c)    32 permanent teeth                       (d) 32 temporary teeth

      Ans: 32 permanent teeth

3.      The organ, which secretes digestive juices in the small intestine, is the –

(a)   Liver                                         (b)  Salivary glands

(c)    Stomach                                 (d) Food pipe

      Ans: liver

4.      The food gets completely digested in the –

(a)   mouth                                      (b)  Stomach

(c)    Small intestine                       (d) Large intestine

      Ans: Small intestine

5.      An eight year old child is likely to have –

(a)   Only temporary teeth                                      (b)  only permanent teeth

(c)    Both temporary and permanent teeth                 

(d)   No teeth at all

      Ans: Both temporary and permanent teeth

D.     ANSWER THE FOLLOWING QUESTIONS IN BRIEF.

1.      Name the organ through which food enters the stomach.

Ans: The food enters the stomach through the food pipe.

2.      How many sets of teeth are formed during one’s life time? Name them.

Ans: Two sets of teeth are formed during one’s life time. They are, temporary teeth and permanent teeth.

3.      Write any one difference between milk teeth and permanent teeth.

Ans: Milk teeth are 20 in number. Permanent teeth are 32 in number.

4.      What do you mean by the term ‘digestion’?

Ans: The process by which complex food materials are broken down into simpler forms, is called digestion.

5.      What happens to the food when it enters the stomach? 

Ans: i) The stomach stores the food for a few hours.

ii) The food mixes with the digestive juices secreted by the walls of the stomach.

ii) The food is partially digested here.

E.      ANSWER THE FOLLOWING QUESTIONS.

1.      List five good habits that should be taken care of at the time of eating food.

Ans: One should,

i) wash hands before eating.

ii) chew food properly before swallowing.

iii) not speak while chewing food.

iv) eat green vegetables and fruits everyday.

v) eat a balanced diet. 

2.      Name the different types of teeth present in the mouth. Also mention their functions.

Ans: The different types of teeth present in the mouth are; incisors, canines, pre-molars and molars.

               i) Incisors - Biting and cutting the food.

               ii) Canines - Tearing the food

               iii) Premolars and Molars - Chewing and grinding the food

3.      Why is it important to chew the food properly?

Ans: i) Chewing converts the larger food particles into smaller pieces. Smaller food pieces get easily digested.

        ii) So, it is important to chew the food properly for proper digestion of food.

4.      Why is washing of fruits and vegetables important for us?

Ans: i) Unwashed fruits and vegetables can carry germs which may cause different diseases.

ii) Unwashed fruits and vegetables can also carry very small eggs of worms. When they reach our stomach, they can produce worms, making the person weak and unhealthy.

So, it is important to wash fruits and vegetables.

5.      Sheena’s mother often tells her not to eat too many sweets and chocolates. Why do you think she says so?

Ans: i) Sweets and chocolates are sugary food items.

ii) If sugar and bacteria are left on the teeth for long, they can cause tooth decay.

This may be the reason that Sheena’s mother often tells her not to eat too many sweets and chocolates.

MY BODY EXERCISE QA FOR STD 3

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CHAPTER 1 : MY BODY

EXERCISE QUESTIONS AND ANSWERS

A.     FILL IN THE BLANKS.

 

1.      Our ________ is sensitive to different tastes.

Ans: Tongue

2.      Loud sounds are unpleasant and harmful for _________.

Ans: Ear

3.      _______ helps us to feel smooth and rough surfaces.

Ans: Skin

4.      We should avoid reading in ________ light.

Ans: Dim

5.      We have ________ sense organs.

Ans: Five

B.      WRITE TRUE OR FALSE FOR THE FOLLOWING STATEMENTS:

 

1.      Our body has many parts.                                                                                           True

2.      Sense organs help us to sense various things around us.                                          True

3.      We can find out whether the tea is hot or cold just by smelling it.                         False

4.      We get the feeling of pain when we are injured.                                                        True

5.      We can find out the colour of a leaf by just touching it.                                           False

 

C.      TICK THE CORRECT OPTION.

 

1.      We feel through our -

(a)   Ears         (b) Skin          (c) Eyes        (d) Ears

      Ans: Skin

2.      We should take bath -

(a)   Daily           (b) Weekly         (c) Fortnightly           (d) Monthly

      Ans: Daily

3.      It is not a sense organ.

(a)   Nose       (b)  Stomach       (c) Ears       (d) Skin

       Ans: Stomach

 

D.     ANSWER THE FOLLOWING QUESTIONS IN BRIEF.

 

1.      Name all the sense organs.

Ans: Name of all the sense organs are; Tongue, Eyes, Ears, Skin and Nose.

2.      What does our nose help us to do?

Ans: i) Our nose helps us to smell different types of ‘smells’ and ‘fragrances’.

        ii) It helps us to differentiate between good and bad smells.

3.      What types of sounds are differentiated by our ears?

Ans: Our ears differentiate between loud sounds (unpleasant sounds) and gentle sounds (pleasant sounds).

4.      Why should we mediate and exercise regularly.

Ans: i) We should meditate and exercise regularly in order to protect our sense organs.

        ii) Meditation also helps us to stay calm and quiet in different situations.

E.      ANSWER THE FOLLOWING QUESTIONS.

 

1.      Name the different types of ‘tastes’. Draw a diagram of a tongue showing all its taste related parts.

Ans: The different types of tastes are, Sweet, Bitter, salty and sour.

                DIAGRAM OF TONGUE SHOWING ITS TASTE RELATED PARTS:- 

 

2.      How are eyes useful to us?

Ans: i) Eyes help us to see various objects around us.

        ii) Eyes help us to know whether an object is nearby

            or far off.

        iii) Eyes help us to know the difference between

             various colours.

        iv) Eyes also help us to express our feelings and emotions.

3.      List some pleasant and unpleasant sounds around us.

Ans: i) Pleasant sounds- chirping of birds, water flowing in streams, voice of koel etc.

        ii) Unpleasant sounds- bursting of tyres, noise in the traffic, children shouting in the class, barking of dog etc.

4.      Write the role of skin in our body.

Ans: i) Skin enables us to feel smooth and rough surfaces, hot and cold things and so on.

        ii) We also get the feeling of pain when we are injured or bitten by an insect.

       iii) The skin also helps to protect the parts of our body present below it.

5.      Write any two activities where we use more than one sense organ.

Ans: We use more than one sense organs, while,

      i) Watching T.V. (we use our ears and eyes)

     ii) While eating food (we use our eyes, tongue, skin)