Here we are providing Class 7 Science Objective Chapter – 17 Forests : Our Lifeline because its very important for Class 7 students as we all know that every board exam question has MCQs so that students should practice these questions so that students can get good marks in board. Class 7 Science Objective Chapter – 17 Forests : Our Lifeline is an extremely important and its also a year in which students learn the fundamentals of concepts that help them lay a solid foundation for their higher education. Here we are providing in Class Class 7 Science Objective Chapter – 17 Forests : Our Lifeline 100+ questions so that students practice more and more. If you want class wise Notes Then Click Here
Class 7 Science Objective Chapter – 17 Forests : Our Lifeline
1.Which of the following is influenced by forests?
( A ) Temperature
( B ) Climate
( C ) Animals
( D ) All of these
Ans – ( D )
2.Which one of the following is not a wild animal?
( A ) Bear
( B ) Bison
( C ) Jackal
( D ) Goat
Ans – ( D )
3. Thing that is not obtained from the wood is
( A ) paper
( B ) thermocol
( C ) matchsticks
( D ) plywood
Ans – ( B )
4.Which of the following is a forest plant?
( A ) Sheesham
( B ) Neem
( C ) Bamboo
( D ) All of these
Ans – ( D )
5.Which one of the following is an animal product?
( A ) Gum
( B ) Catechu
( C ) Honey
( D ) Rubber
Ans – ( C )
6.The branchy part of a tree above the stem is called
( A ) leaves
( B ) crown
( C ) saplings
( D ) canopy
Ans – ( B )
7.Roof of the forest made by the branches of the tall trees is called
( A ) canopy
( B ) crown
( C ) understoreys
( D ) none of these
Ans – ( A )
7.Which of the following is not the name of a tree?
( A ) Teak
( B ) Sal
( C ) Porcupine
( D ) Kachnar
Ans – ( C )
8.Understoreys are formed due to
( A ) different types of crowns
( B ) different sizes of crown
( C ) different heights of trees
( D ) all of these
Ans – ( D )
9.Which kind of plants generally constitute understorey layer in the forest?
( A ) Grass
( B ) Shrubs
( C ) Tall trees
( D ) Herbs
Ans – ( B )
10.Decomposers convert the dead plant and animal tissues into
( A ) clay
( B ) humus
( C ) inorganic debris
( D ) soil
Ans – ( B )
11.The smallest wild animal amongst the following is
( A ) fox
( B ) boar
( C ) bison
( D ) porcupine
Ans – ( D )
12.Arrange the following components of a food chain in proper sequence – grass, frog, eagle, insects, snake.
( A ) Grass → insects → frog → snake → eagle.
( B ) Grass → snake → insects → frog → eagle.
( C ) Grass → snake → eagle → insects → frog.
( D ) All are possible
Ans – ( A )
13.Name the organism on which all animals depend for food.
( A ) Humus
( B ) Plants
( C ) Insects
( D ) Crops
Ans – ( B )
14.Sequence that represents the series of eating and being eaten is called
( A ) food series
( B ) food chain
( C ) food web
( D ) food hub
Ans – ( B )
15.Decomposers convert the dead plants and animals into
( A ) humus
( B ) oxygen
( C ) litter
( D ) fertilisers
Ans – ( A )
16.Which one of the following is a role of forests?
( A ) Provide food, shelter, water and medicines
( B ) Prevent soil erosion
( C ) Prevent flood
( D ) All the above
Ans – ( D )
17.What are known as ‘green lungs’?
( A ) Forests
( B ) Grasshoppers
( C ) Rivers
( D ) All of these
Ans – ( A )
18.Which among the following forest animals is the smallest?
( A ) Fox
( B ) Boar
( C ) Bison
( D ) Porcupine
Ans – ( D )
19.Which of the following we can get from forests?
( A ) Food
( B ) Shelter
( C ) Fibre
( D ) All of these
Ans – ( D )
20.Micro-organisms act upon the dead plants to produce:
( A ) sand
( B ) mushrooms
( C ) humus
( D ) wood
Ans – ( C )
21.Which of the following is an animal product?
( A ) Rubber
( B ) Catechu
( C ) Gum
( D ) Honey
Ans – ( D )
22.A dark coloured substance which is formed from the dead bodies of plants and animals is called:
( A ) plants roots
( B ) humus
( C ) canopy
( D ) none of these
Ans – ( B )
23.Thing that is not obtained from the wood is
( A ) paper
( B ) thermocol
( C ) matchsticks
( D ) plywood
Ans – ( B )
24.The insects butterflies help flowering plant in:
( A ) deforestation
( B ) pollination
( C ) humus
( D ) none of these
Ans – ( C )
25.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
Ans – ( C )
26.A forest is a purifier of:
( A ) water
( B ) air
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( A )
27.Deforestation will lead to decrease in
( A ) soil erosion
( B ) rainfall
( C ) drought
( D ) global warming
Ans – ( B )
28.Branchy part of a tree above the stem is known as the:
( A ) crown
( B ) canopy
( C ) humus
( D ) all the above
Ans – ( C )
29.Greenhouse gases
( A ) trap heat of the sun
( B ) are green in colour
( C ) do not trap heat of the sun
( D ) smell foul
Ans – ( A )
30.Cutting and destroying the forests is called:
( A ) erosion
( B ) decomposers
( C ) deforestation
( D ) all the above
Ans – ( B )
31.Which of the following forms the lowermost layer of forest?
( A ) Tall tree
( B ) Herbs
( C ) Shrubs
( D ) None of these
Ans – ( B )
32.The branches of the tall trees look like a roof over the other plants in the forest is called a:
( A ) humus
( B ) canopy
( C ) crown
( D ) none of these
Ans – ( D )
33.The first link in all food chains is:
( A ) herbivores
( B ) carnivores
( C ) green plants
( D ) none of these
Ans – ( C )
34.The plant also maintain the balance of oxygen and carbon dioxide in the atmosphere, so the forests are called:
( A ) heart
( B ) skin
( C ) kidney
( D ) lungs
Ans – ( D )
35.What is the role of forests?
( A ) Provide food, shelter, water and medicine
( B ) Prevent soil erosion
( C ) Prevent floods
( D ) All of these
Ans – ( D )
36. Which is not a function of forest?
( A ) Water cycle
( B ) Balancing oxygen and carbon dioxide
( C ) Wild life habitat
( D ) Formation of soil
Ans – ( D )
37.Which of the following products is not obtained from a forest?
( A ) Honey
( B ) Catechu
( C ) Gum
( D ) Wheat
Ans – ( D )
38. A tree species in Mauritius failed to reproduce because of extinction of a fruit eating bird. The bird was
( A ) Condor
( B ) Dodo
( C ) Dove
( D ) Skua
Ans – ( B )
39.Which of the following has the strongest stem?
( A ) A tree
( B ) A creeper
( C ) A climber
( D ) A bush
Ans – ( A )
40. Mushroom and other micro-organismseat
( A ) Brinjal
( B ) Rice
( C ) Humus
( D ) wax
Ans – ( C )
41.Deforestation results in
( A ) increased rainfall
( B ) increase in earth’s temperature
( C ) increase in water level
( D ) conservation of soil
Ans – ( B )
42. Microorganism that convert plants and animals dead parts into humus are called
( A ) Producer
( B ) Carnivores
( C ) Herbivores
( D ) Decomposer
Ans – ( D )
43.Decomposers convert the dead plants and animal tissues into
( A ) clay
( B ) inorganic debris
( C ) humus
( D ) soil
Ans – ( C )
44. Microorganism that convert plants and animals dead parts into humus are called
( A ) Producer
( B ) Carnivores
( C ) Herbivores
( D ) Decomposer
Ans – ( D )
45.The series of eaten and being eaten is called a
( A ) food chain
( B ) food web
( C ) food series
( D ) food hub
Ans – ( A )
46. What are known as ‘green lungs’?
( A ) Forests
( B ) Grasshoppers
( C ) Rivers
( D ) All of these
Ans – ( A )
47.Which of the following is not the name of a tree?
( A ) Teak
( B ) Sal
( C ) Porcupine
( D ) Kachnar
Ans – ( C )
48. Mountains appear green due to
( A ) Green coloured stone
( B ) Absence of plants
( C ) Presence of plants
( D ) All of these
Ans – ( C )
49.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
Ans – ( C )
