Something to Know
A. Fill in the blanks.
1. Our tongue is sensitive to different tastes.
2. Loud sounds are unpleasant and harmful for ears.
3. Skin helps us to feel smooth and rough surfaces.
4. We should avoid reading in dim light.
5. We have five sense organs.
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) nose
(b) skin (✔)
(c) eyes
(d) ears
Answer – (b) skin
2. We should take bath
(a) daily (✔)
(b) weekly
(c) fortnightly
(d) monthly
Answer – (a) daily
3. It is not a sense organ.
(a) nose
(b) stomach (✔)
(c) ears
(d) skin
Answer – (b) stomach
D. Answer the following questions in brief.
1. Name all the sense organs.
Answer – All the sense organs of our body are:-
Nose,
Ears,
Eyes,
Tongue,
Skin.
2. What does our nose help us to do?
Answer – Our nose help us to smell different Smells and fragrances.
3. What types of sounds are differentiated by our ears?
Answer – Our ears can differentiated between loud and gentle sounds.
4. Why should we meditate and exercise regularly?
Answer – We should meditate and exercise regularly to keep our body fit and healthy.
E. Answer the following questions.
1. Name the different types of tastes. Draw a diagram of a tongue showing all its taste related parts.
Answer – The different types of tastes are:
Sweet
Bitter
Sour
Salty
Diagram of tongue
2. How are eyes useful to us?
Answer – Eyes help us to see various object around and us and it also help us to get idea of the distance of various object and know the difference between various colours.
3. List some pleasant and unpleasant sounds around us.
Answer – Pleasant sound around us are birds chirping, sound of slow music, children playing and laughing.
Unpleasant sound around us are vehicles moving sounds, animals making different sounds, crackers and tyres bursting etc..
4. Write the role of skin in our body.
Answer – Skin help us to feel smooth and rough surfaces, hot and cold things. It helps us to feel pain when we are injured or bitten by an insect. It also protects the parts of our body below it.
5. Write any two activities where we use more than one sense organ.
Answer – Two activities where we use more than one sense organs.
i) While eating we use both tongue and nose.
ii) While watching television we use both our eyes and ears.
Value Based Question
Rahul, a keen observer, noticed that, over the last few days, his grandfather was not very quick in responding to his requests, demands or queries. He mentioned this to his father. His father immediately decided to get him checked by an ENT specialist. The specialist checked the grandfather’s ears and provided him with a good ‘hearing-aid’. Rahul’s grandfather felt very happy when he was again able to hear clearly with the help of his ‘hearing-aids’.
1. Think of the problems that Rahul’s grandfather might have faced, due to his not being able to hear clearly-
(a) while at home.
Answer – Rahul’s grandfather will not be able to respond quickly if someone will call him. He will unable to hear TV programmes or music.
(b) on the road.
Answer – He will unable to hear the vehicles horn’s sound, which may lead to accident.
(c) in the park.
Answer – He will unable to hear the sound of other people calling him and will not be able to respond them.
(d) at the market.
Answer – He will unable to hear the shopkeepers and will not be able to buy things from the market.
2. Rahul and his father displayed some values in the situation discussed above. Discuss, with your classmates, about the values shown by them.
Answer – The values shown by Rahul and his father were
They are responsible as they noticed his grandfather was not responding quickly.
They are caring as they look him to hospital.
3. If you had a classmate with some hearing problem, how will you help him or her-
(a) in the class?
Answer – I will help him to understand what teacher or other students were saying to him.
(b) in the playground?
Answer – I will help him to understand what game we are playing and will not let him feel left out.
Something to Do
1. Spend sometime with your grandparents and share your daily experiences with them. Assist them in their routine work.
Answer – Students will do this as an enrichment or development of values of life in them.
2. Find out about the sensing capability of dogs and hearing capability of bats. Do they have something special in them?
Answer – A dog can smell any object with the help of an olfactory (sense of smell) present above their mouth. This enhances the sensing capability of dogs than any other animals.
While in the case of the bats, their hearing organs are quite sharp and powerful, so that they are able to hear even a small sound that occurs around them.