Q16 of 20 Page 46

Earthworms are known as ‘farmer’s friends’. Why?

Earthworm actually eats it’s way through the soil and then throws away the undigested part of the material it eats. This activity of earthworm makes the soil more useful for the plant.


More from this chapter

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14

Bones are hard structures and cannot be bent. But, we can still bend our elbow, knee, etc. How is this possible?

 15

Which type of movement would have been possible if

(a) our elbow had a fixed joint?


(b) we were to have a ball and socket joint between our neck and head.

 17

(a) Unscramble the jumbled words and write them in the blank spaces provided.

(i) neosb ……………….


(ii) themevom ………………..


(iii) iontcaronct …………………


(iv) lsecsum …………………


(v) arctigeal …………………….


(vi) epahs …………………….


(vii) sangro inerlan …………………….


(viii) laxaaeriont ……………………

 17

Read the following paragraph and fill in the blanks using the words you unscrambled.

………(a)…….. and ………(b)…….. from the skeleton of the human body. They provide the framework. Give ……………(c)……….. to the body and help in ………….(d)………… They protect the …(e)……. The bones are moved by alternate …….(f)….. and …….(g)…… of two sets of ……(h)……… attached to them.