Ncert exemplar solutions science class 7 Solutions for Chapter 17 forests our lifeline

Exercises in Chapter 17 forests our lifeline Grade 7

Forests: Our Lifeline - Exercise

Questions in Forests: Our Lifeline - Exercise

Which of the following serves as green lungs?

(a) The green pigment of the plants

(b) Forests

(d) Greenhouse gases

Boojho visited a forest near his town with his classmates and his teacher. As they were entering the forest, their class teacher told them not to make noise in the forest as the noise could disturb the

(a) birds

(b) animals

(d) plants

Which among the following forest animals is the smallest?

(a) Fox

(b) Boar

(d) Porcupine

Which of the following has the strongest stem?

(a) A tree

(b) A creeper

(d) A bush

Which of the following is not prepared from the wood obtained from the forest?

(a) Paper

(b) Thermocol

(d) Plywood

Which of the following is not the name of a tree?

(a) Teak

(b) Sal

(d) Kachnar

Pick the option which gives the names of a tree and an animal, respectively from the following.

(a) semal, hornbill

(b) sal, khair

(d) neem, palash

Which of the products is not obtained from a forest?

(a) Honey

(b) Catechu

(d) Ginger

The branchy part of a tree above the stem is known as

(a) crown

(b) canopy

(d) humus

Forests are not responsible for

(a) providing medicinal plants.

(b) maintaining the flow of water into the streams.

(d) absorbing rainwater and maintaining the water table

Paheli while moving in a forest observed that there was no noise pollution, though lots of heavy vehicles were passing from the nearby highway. Explain why?

State whether the following statements are true or false. If false, give the correct statement.

(a) Forests influence climate, water cycle and air quality.

(b) In a forest, trees form the uppermost layer, followed by herbs. The shrubs form the lowest layer of vegetation.

(d) Forests protect the soil from erosion.

Paheli wrote a food chain in the following way:

frog → eagle → insects → grass → snake

The chain is not in the correct order. Help her to write the food chain correctly.

Give names of any four birds which you expect to see in a forest.

Two friends shared their experiences of their vacation trip to two different forests. Do you think they would have seen the same type of plants and animals during their respective trips? Give reason.

“A bunch of seedlings were seen sprouting on a heap of animal dropping in a forest.” How do you think is the seedling benefited from the animal dung?

Match Column I with Column II

Column I	Column II
a) Decomposers	i) Dead plant and animal tissues
b) Canopy	ii) Habitat for wildlife
c) Porcupine	iii) Microorganisms
d) Humus	iv) Wild animal
e) Forest	v) Branches of tall trees