CBSE Class 7 Science Forests Our Lifeline MCQs Set B

Question: A fibre used to make ropes and mattresses
a) Cane
b) Coir
c) Wool
d) None of the options
Answer: b

Question: Soil erosion can be prevented by:
a) Overgrazing
b) Removal of vegetation
c) Afforestation
d) Deforestation
Answer: c

Question: Common plant fibre(s) used to make cloth
a) Linen
b) Flax
c) Cotton
d) All of the options
Answer: d

Question: Deforestation generally decreases.
a) Rain fall
b) Soil erosion
c) Drought
d) Global warming
Answer: b

Question: Which of the following is not a forest product?
a) Wood
b) Honey
c) Nylon
d) Gum
Answer: c

Question: The first link in all food chains is –
a) Herbivores
b) Carnivores
c) Green plants
d) All of the options
Answer: c

Question: The main reasons for deforestation are
a) Cattle ranching
b) Illegal logging
c) Excessive agriculture
d) All of the options
Answer: d

Question: Which of the following is a producer?
a) Herbivores
b) Green plants
c) Carnivores
d) Decomposer
Answer: b

Question: Trees that have a medicinal value
a) Bamboo
b) Neem
c) Teak
d) All of the options
Answer: b

Question: Bamboo is used for
a) Paper
b) Baskets
c) Fodder
d) All of the options
Answer: d

Question: Deforestation has an alarming effect on:
a) Soil erosion
b) Increase in grazing area
c) Weed control
d) Sunlight
Answer: a

Question: Cane is used to make
a) Furniture
b) Paper
c) Medicines
d) Essential oils
Answer: a

Question: In a food chain green plants form:
a) First trophic level
b) Second trophic level
c) Third trophic level
d) Complete food chain
Answer: a

Question: Essential oils are used in
a) Confectioneries
b) Bakeries
c) Cosmetics
d) All of the options
Answer: d

Question: The lowest layer in the forest is occupied by –
a) Trees
b) Shrubs
c) Herbs
d) All of the options
Answer: c

Question: Trees that give us timber
a) Rosewood
b) Mahogany
c) Teak
d) All of the options
Answer: d

Question: In a forests ecosystem green plants are:
a) Primary producers
b) Primary consumers
c) Consumers
d) Decomposers
Answer: a

Question: Tress that give us essential oils
a) Camphor
b) Eucalyptus
c) Pine
d) All of the options
Answer: d

Question: Few measures of conservation of forests are
a) Planned cultivation
b) Afforestation
c) Prevention of overgrazing
d) All of the options
Answer: d

Question: Which of the following is a decomposer?
a) Tulsi
b) Snake
c) Fungi
d) Lion
Answer: c

Question: In a food chain, the largest population is that of –
a) Producers
b) Decomposers
c) Secondary consumers
d) Primary consumers
Answer: a

Question: Deforestation generally decreases –
a) Rain fall
b) Soil erosion
c) Drought
d) Global warming
Answer: a

Question: In a forests ecosystem green plants are –
a) Primary producers
b) Primary consumers
c) Consumers
d) Decomposers
Answer: a

Question: A group of interconnected food chain is –
a) Complex of food chain
b) Food cycle
c) Food web
d) Pyramid of energy
Answer: c

Question: In an ecological pyramid green plants form
a) First trophic level
b) Second trophic level
c) Third trophic level
d) Complete food chain
Answer: a

Question: In a natural ecosystem, decomposers include –
a) Bacterial and fungi
b) Parasitic algae
c) Macroscopic animals
d) All the above
Answer: a

Question: Soil erosion can be prevented by –
a) Overgrazing
b) Removal of vegetation
c) Afforestation
d) Deforestation
Answer: c

Question: Deforestation has an alarming effect on –
a) Soil erosion
b) Increase in grazing area
c) Weed control
d) Sunlight
Answer: a

Question: Ecosystem comprises both abiotic and biotic components. Biotic component of an ecosystem consists of-
a) Producers
b) Consumers
c) Decomposers
d) All the above
Answer: d

Question: In a forest ecosystem, the fungi come under the category of –
a) Decomposers
b) Primary producers
c) Secondary consumers
d) Tertiary consumers
Answer: a