Science question Answer std 3 my Body

My body

D1.Name all the sense organs.

Ans: The sense organs of human body are:

1)eye 2)Nose   3)tongue          4)ear   5)skin

D2.what does our nose help us to do  ?

Ans: Our nose helps us to smell different types of fragrances .It can differentiate between good and bad smells.

D3.what types of sound are differentiated by our ears?

Ans: our ear can differentiate between loud and gentle sounds and pleasant and unpleasant sounds.

D4.Why should we meditate and exercise regularly?

Ans: We should meditate and exercise regularly to keep us healthy and fit.

E1.Name the different types of tastes. Draw a diagram of a tongue showing all its taste related parts.

Ans: There are four different types of taste like sweet, sour, salty and bitter.

E2.How eyes are useful to us?

Ans: Eyes are useful to us in the following ways:

1) they help us to see various objects around us

2) they help us to get idea of the distance of various objects.

3) They help us to know the difference s between various colors.

E3. List some pleasant and unpleasant sounds around us.

List of Pleasant sounds:

Chirping of the bird

Classical music

Flute sound

 Singing of Cuckoo.

Sound of stream

List of unpleasant sounds:

Vehicles sound

Cracker 

Loud Music

Sound of Landing aeroplane.

Grinder sound

E4. Write the role of skin in our body.

Ans:The skin enable us to feel smooth and rough, hot and cold. We also get the feeling of pain when we are injured or bitten by insects.

E5. Write any two activities where we use more than one sense organ.

Ans:we use more than two sense organ in the following activities.

1) Watching television (eye &ear)

2) Driving: (eye &ear )

3)Dancing (ear &eye)

4)eating food (tongue, eye& nose)

Extra questions

Q1.what are sense organs?

Ans:The organ  which help us to sense various things present around us are called sense organs.

Q2.How can you take care of your eye?

Ans:I can take care of my eye in the following ways:

i)By avoiding watching TV for long period

ii) I should not look  at the sun directly

iii) By avoiding reading in dim light

iv)By avoiding watching TV playing video game ,playing with mobile phone.

Value Based question

Q1.What problem Rahul’s grandfather might have faced:-

a)While at home: Rahul’s grandfather will not be able to hear T.V programmers and communicate properly family members. He can’t participate in the family discussion.

b)On the Road: He will not be able to hear the sound of vehicle and may face road accident.

c)In the Park: He will not be able to hear the sound made by the children  and the chirping of the birds.

d)In the Market: He will not able to know the cost of commodities as well as unable to communicate with the shopkeeper.

Q2.What is the functions of tongue?

Ans:function of tongue are

1)It helps to speak

2)It mixes the food with saliva

3) It identifies the taste of food

4 It helps to swallow the food