05/04/2022

Q.6. Have you ever been troubled by mosquitoes? Just think, how do they know where you are?

Ans.Mosquitoes can recognise the smell of our body. They can also recognise us by the heat from our body

Q.7. Have you seen a dog sniffing here and there? What do you think it is trying to smell?

Ans.Yes, I have seen a dog sniffing here and there. A dog can make out the presence of another dog in the area by smelling its urine or faeces. The dog usually smells to find out if a new dog has come in the area.

Q.8. In what ways do human beings make use of this special sense of smell of dogs?

Ans. This special sense of smell of dogs is used by humans in many ways. Some examples are as follows:

(a) For catching criminals.

(b) For detecting stolen goods.

(c) For detecting bombs.

(d) To guard our houses and properties.

Q.9 Name the animals that you would be able to recognise only by their smell, without seeing them.

Ans. We can recognise the following animals by their smell: Dogs, cats, buffalo, cow, fish, goat, pig etc.

Q.10. Write the name of a bird which has eyes in front of its head (like in humans).

Ans. Owl.

Q.11. Write the names of some birds which have eyes on either side of the head. What is the size of their eyes as compared to the size of their head?

Ans. Following birds have eyes on either side of the head:

Pigeons, crows, sparrows, eagles, etc.

Their eyes are very small as compared to the size of their head.



.......to be continued