We have compiled the NCERT MCQ Questions for Class 7 Science Chapter 17 Forests: Our Lifeline with Answers Pdf free download covering the entire syllabus. Practice MCQ Questions for Class 7 Science with Answers on a daily basis and score well in exams. Refer to the Forests: Our Lifeline Class 7 MCQs Questions with Answers here along with a detailed explanation.
Forests: Our Lifeline Class 7 MCQs Questions with Answers
Choose the correct option.
Question 1.
Which of the following is influenced by forests?
(a) Temperature
(b) Climate
(c) Animals
(d) All of these
Answer
Answer: (d) All of these
Question 2.
Which of the following is a forest plant?
(a) Sheesham
(b) Neem
(c) Bamboo
(d) All of these
Answer
Answer: (d) All of these
Question 3.
The branchy part of a tree above the stem is called
(a) leaves
(b) crown
(c) saplings
(d) canopy
Answer
Answer: (b) crown
Question 4.
Which of the following is not the name of a tree?
(a) Teak
(b) Sal
(c) Porcupine
(d) Kachnar
Answer
Answer: (c) Porcupine
Question 5.
Which kind of plants generally constitute understorey layer in the forest?
(a) Grass
(b) Shrubs
(c) Tall trees
(d) Herbs
Answer
Answer: (b) Shrubs
Question 6.
The smallest wild animal amongst the following is
(a) fox
(b) boar
(c) bison
(d) porcupine
Answer
Answer: (d) porcupine
Question 7.
Name the organism on which all animals depend for food.
(a) Humus
(b) Plants
(c) Insects
(d) Crops
Answer
Answer: (b) Plants
Question 8.
Decomposers convert the dead plants and animals into
(a) humus
(b) oxygen
(c) litter
(d) fertilisers
Answer
Answer: (a) humus
Question 9.
What are known as ‘green lungs’?
(a) Forests
(b) Grasshoppers
(c) Rivers
(d) All of these
Answer
Answer: (a) Forests
Question 10.
Which of the following we can get from forests?
(a) Food
(b) Shelter
(c) Fibre
(d) All of these
Answer
Answer: (d) All of these
Question 11.
Which of the following is an animal product?
(a) Rubber
(b) Catechu
(c) Gum
(d) Honey
Answer
Answer: (d) Honey
Question 12.
Thing that is not obtained from the wood is
(a) paper
(b) thermocol
(c) matchsticks
(d) plywood
Answer
Answer: (b) thermocol
Question 13.
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 water table
Answer
Answer: (c) creating flood conditions
Question 14.
Deforestation will lead to decrease in
(a) soil erosion
(b) rainfall
(c) drought
(d) global warming
Answer
Answer: (b) rainfall
Question 15.
Greenhouse gases
(a) trap heat of the sun
(b) are green in colour
(c) do not trap heat of the sun
(d) smell foul
Answer
Answer: (a) trap heat of the sun
Question 16.
Which of the following forms the lowermost layer of forest?
(a) Tall tree
(b) Herbs
(c) Shrubs
(d) None of these
Answer
Answer: (b) Herbs
Question 17.
The first link in all food chains is:
(a) herbivores
(b) carnivores
(c) green plants
(d) none of these
Answer
Answer: (c) green plants
Question 18.
What is the role of forests?
(a) Provide food, shelter, water and medicine
(b) Prevent soil erosion
(c) Prevent floods
(d) All of these
Answer
Answer: (d) All of these
Question 19.
Which of the following products is not obtained from a forest?
(a) Honey
(b) Catechu
(c) Gum
(d) Wheat
Answer
Answer: (d) Wheat
Question 20.
Which of the following has the strongest stem?
(a) A tree
(b) A creeper
(c) A climber
(d) A bush
Answer
Answer: (a) A tree
Question 21.
Deforestation results in
(a) increased rainfall
(b) increase in earth’s temperature
(c) increase in water level
(d) conservation of soil
Answer
Answer: (b) increase in earth’s temperature
Question 22.
Decomposers convert the dead plants and animal tissues into
(a) clay
(b) inorganic debris
(c) humus
(d) soil
Answer
Answer: (c) humus
Question 23.
The series of eaten and being eaten is called a
(a) food chain
(b) food web
(c) food series
(d) food hub
Answer
Answer: (a) food chain
Question 24.
Which of the following is not the name of a tree?
(a) Teak
(b) Sal
(c) Porcupine
(d) Kachnar
Answer
Answer: (c) Porcupine
Question 25.
Which of the following will help in the conservation of forests?
(a) Recycling of jute bags
(b) Recycling of cotton bags
(c) Recycling of paper bags
(d) Recycling of plastic bag
Answer
Answer: (c) Recycling of paper bags
Fill In the Blanks
Question 1.
Forests are known as the ……………… of the earth.
Answer
Answer: Lungs
Question 2.
The uppermost layer of the forest is known as ……………… layer.
Answer
Answer: emergent
Question 3.
The branches of the tall trees look like a roof over the other plants in the forest. This is called a ………………
Answer
Answer: canopy
Question 4.
……………… form the lowest layer of the forest.
Answer
Answer: Herbs
Question 5.
Many food chains together constitute a ………………
Answer
Answer: food web
Question 6.
Some microorganisms feed on dead and decaying animal tissues and convert them into a dark coloured substance called ………………
Answer
Answer: humus
Question 7.
Microorganisms which convert dead and decaying plants and animals into humus are called ………………
Answer
Answer: decomposers
Question 8.
……………… is an example of scavenger.
Answer
Answer: Vulture
Question 9.
In a food chain, plants are the ………………
Answer
Answer: producer
Question 10.
Some animals in the forest could be recognised by forest officers by their ……………… and ………………
Answer
Answer: droppings; footprints
Question 11.
Forests protect the ……………… from erosion.
Answer
Answer: soil
Question 12.
The presence of ……………… ensures that the nutrients from dead and decaying organisms are present in soil.
Answer
Answer: humus
Question 13.
Different layers of vegetation provides ……………… and ……………… for the animals.
Answer
Answer: food; shelter
Question 14.
Forests are ……………… for a large number of animals.
Answer
Answer: habitat
Question 15.
Planting trees on a large scale is called ………………
Answer
Answer: afforestation
Question 16.
Forest provides a …………………. for many animals and plants.
Answer
Answer: home
Question 17.
The types of animals …………………. from forest to forest.
Answer
Answer: differ
Question 18.
The …………………. animals’ bodies provide nutrients to the seedlings in the forest to grow.
Answer
Answer: decaying
Question 19.
Forest is full of life and ………………….
Answer
Answer: vitality
Question 20.
A forest is a purifier of …………………. and water.
Answer
Answer: air
Question 21.
Forests are the …………………. for the forest dwelling communities.
Answer
Answer: shelter
Question 22.
Forest also acts as natural …………………. of rainwater.
Answer
Answer: absorber
True or False
Question 1.
Forests are harmful for living beings.
Answer
Answer: False
Question 2.
Tiger is a wild animal.
Answer
Answer: True
Question 3.
Forests are a habitat for a large number of animals.
Answer
Answer: True
Question 4.
Sheesham is a forest plant.
Answer
Answer: True
Question 5.
Crown is the branchy part of a tree above the stem.
Answer
Answer: True
Question 6.
Only small trees form canopy.
Answer
Answer: False
Question 7.
All trees are of same shape and size.
Answer
Answer: False
Question 8.
Shrubs and small trees form the canopy of the forest.
Answer
Answer: True
Question 9.
All animals, whether herbivores or carnivores, depend on plants ultimately for their food.
Answer
Answer: True
Question 10.
Vulture is an example of scavenger.
Answer
Answer: True
Question 11.
Green plants are autotrophs.
Answer
Answer: True
Question 12.
Human beings are autotrophs.
Answer
Answer: False
Question 13.
Decomposers convert dead plant and animal tissues into humus.
Answer
Answer: True
Question 14.
Forests maintain the O2-CO2 balance in the atmosphere.
Answer
Answer: True
Question 15.
The dead and decaying matter is always moist and warm.
Answer
Answer: True
Question 16.
The soil of the forest is moist and warm because it is covered with leaves and fruits.
Answer
Answer: True
Question 17.
The roots of the trees are called the crown of tree.
Answer
Answer: False
Question 18.
The decaying leaves and animal droppings in a forest enrich the soil nutrition in the form of humus.
Answer
Answer: True
Question 19.
Plants are saprotrophs.
Answer
Answer: False
Question 20.
Forest is a source of medicinal plants.
Answer
Answer: True
Question 21.
Forest protects the soil from erosion.
Answer
Answer: True
Match the Following
| Column I | Column II |
| 1. Deer, rabbit | (a) Who eats whom |
| 2. Food chain | (b) Floor of forest |
| 3. Bacteria and fungus | (c) Tertiary consumers |
| 4. Herbs | (d) Forests |
| 5. Giant and tall trees | (e) Decomposers |
| 6. Green plants | (f) Food web |
| 7. Dynamic living entity | (g) Vulture |
| 8. Lion and tiger | (h) Primary consumers |
| 9. Group of food chains | (i) Top layer of forest |
| 10. Scavenger | (j) Producer |
Answer
Answer:
| Column I | Column II |
| 1. Deer, rabbit | (h) Primary consumers |
| 2. Food chain | (a) Who eats whom |
| 3. Bacteria and fungus | (e) Decomposers |
| 4. Herbs | (b) Floor of forest |
| 5. Giant and tall trees | (i) Top layer of forest |
| 6. Green plants | (j) Producer |
| 7. Dynamic living entity | (d) Forests |
| 8. Lion and tiger | (c) Tertiary consumers |
| 9. Group of food chains | (f) Food web |
| 10. Scavenger | (g) Vulture |
| Column A | Column B |
| 1. Humus | (a) Deforestation |
| 2. Planting of trees | (b) Dark coloured matter |
| 3. Crown | (c) Helps forests to grow |
| 4. Soil | (d) Branchy part of the tree |
| 5. Cutting of trees | (e) Afforestation |
Answer
Answer:
| Column A | Column B |
| 1. Humus | (b) Dark coloured matter |
| 2. Planting of trees | (e) Afforestation |
| 3. Crown | (d) Branchy part of the tree |
| 4. Soil | (c) Helps forests to grow |
| 5. Cutting of trees | (a) Deforestation |
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