NCERT Exemplar Chapter 17- Forests: Our Lifeline (PRACTICE QUESTIONS) Class 7 Science

 1. Which of the following serve as green lungs?

(a) The green pigment of the plants

(b) Forests

(c) Kitchen gardens

(d) Greenhouse gases

2. 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 noise could disturb the

(a) birds

(b) animals

(c) both birds and animals

(d) plants

3. Which among the following forest animals is the smallest?

(a) Fox

(b) Boar

(c) Bison

(d) Porcupine

4. Which of the following has the strongest stem?

(a) A tree

(b) A creeper

(c) A climber

(d) A bush

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

(a) Paper

(b) Thermocol

(c) Matchsticks

(d) Plywood

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

(a) Teak

(b) Sal

(c) Porcupine

(d) Kachnar

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

(a) semal, hornbill

(b) sal, khair

(c) chinkara, blue bull

(d) neem, palash

8. Which of the products is not obtained from a forest?

(a) Honey

(b) Catechu

(c) Gum

(d) Ginger

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

(a) crown

(b) canopy

(c) sapling

(d) humus

10. Forests are not responsible for

(a) providing medicinal plants.

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

(c) creating flood conditions.

(d) absorbing rainwater and maintaining the water table

11. 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?

12. 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.

(c) The forest keeps on growing and changing and can regenerate.

(d) Forests protect the soil from erosion.

13. 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.

14. Match Column I with Column II

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

15.  Figure 17.1 shows a part of a forest.

Write any three activities going on in the forest on the basis of this figure.