Science - Resources on Earth - Forests and Ecosystems
Exam Duration: 45 Mins Total Questions : 30
Study the food chain given below
\(M\rightarrow N\rightarrow O\rightarrow P\rightarrow Q\) |
What will be the immediate impact if the population of 'P' is wiped out due to an illness?
- (a)
M, N, 0 and Q will also die
- (b)
The population of Q will decrease
- (c)
The population of 0 will decrease
- (d)
The population of Q will increase.
What is a long-term effect of clearing of larger areas of rain forest
- (a)
Decreased carbon dioxide content in the air
- (b)
Decreased flooding of low-lying land
- (c)
Increased rainfall in these areas
- (d)
Increased rate of soil erosion.
Which of the following is NOT a consequence of deforestation?
- (a)
Increased levels of ground water
- (b)
Removalof the top layerofsoil bywind
- (c)
Increased levels of carbon dioxide in the atmosphere.
- (d)
Destruction of the natural habitats of plants and animals
What is the name of the process 'X' in the figure
- (a)
Respiration
- (b)
Breathing
- (c)
Feeding
- (d)
Photosynthesis
Which statement describes a food web?
- (a)
It is made up of an extra long food chain
- (b)
It is a food chain with goat as a consumer
- (c)
It is a food chain with man as the final consumer
- (d)
It is made up of many interconnecting food chains
Which of the following gases is increased in air in the absence of forests
- (a)
Oxygen
- (b)
Nitrogen
- (c)
Carbon dioxide
- (d)
Hydrogen
Study the given diagram
Which of the following components is exchanged by plants and animals for their life processes to take place
- (a)
Space
- (b)
Gases
- (c)
Water
- (d)
Nutrients
Which of the following groups consists of a decomposer, a producer and a predator respectively
- (a)
Grass, goat and eagle
- (b)
Mould, sugarcane and lizard
- (c)
Papaya plant, caterpillar and bird
- (d)
toad stool, rotting log and earth-worm.
Observe the qiven diaqram of tree
Which of these statements best explains the shape of the given tree?
- (a)
Trees that have very thick trunk have such crowns
- (b)
The branches spread out so that they receive enough sunlight and can be home to any animals
- (c)
The leaves are spread out not to receive as much sunlight as possible
- (d)
The branches spread the leaves so as to protect trees from predators
Which of the following trees would be most suitable for growing along a walkway?
- (a)
A and C
- (b)
A and B
- (c)
Band C
- (d)
A and D
Which of the following are the two components of an ecosystem
- (a)
Plants and animals only
- (b)
Trees and fungi only
- (c)
Living and nonliving
- (d)
Frogs and man only
What does the diagram given below represent?
- (a)
The life cycle of grass
- (b)
A population
- (c)
Animals living in a habitat
- (d)
A food chain
Which of the following plays an important role in causing rainfall
- (a)
Animals
- (b)
Plants
- (c)
Factories
- (d)
Vehicles
Which of the following might happen if plants stop releasing oxygen into the atmosphere?
- (a)
Plants will be more healthier
- (b)
Number of plants will increase
- (c)
Number of animals will increase
- (d)
Living organisms will die due to the lack of oxygen
In nature there is an interdependence between plants and animals for food, oxygen and carbon dioxide. Which of the following conclusions is true about the given statement?
- (a)
Some day all the oxygen will be used up by the animals
- (b)
Some day all the carbon dioxide will be used up by the plants
- (c)
The amount of oxygen is increasing and that of carbon dioxide is decreasing in our atmosphere
- (d)
The level of oxygen and carbon dioxide in the atmosphere is kept constant
In which of the following groups of animals vultures and jackals are included
- (a)
Herbivores
- (b)
Decomposers
- (c)
Scavengers
- (d)
Parasites
What is the bird called in the given food chain?
\(Grass~ \rightarrow Grasshoppers\rightarrow ~ Birds~ \rightarrow Snakes\) |
- (a)
Producer
- (b)
Parasite
- (c)
Decomposer
- (d)
Consumer
Which ofthe following statements is NOT correct
- (a)
Forests protects the soil from erosion
- (b)
Pants and animals in a forest are dependent on one another
- (c)
Forest do not influence the climate and water cycle
- (d)
Soil helps the forests to grow and regenerate
Water vapour is returned to the atmosphere through which of the following processes
(i) Respiration carried out by living organisms. (ii) Transpiration carried out by living organisms. (iii) The evaporation of water from ponds, lakes and seas |
- (a)
(i) only
- (b)
(ii) and (iii) only
- (c)
(i) and (iij) only
- (d)
(i), (ij) and (iij
A balanced and stable ecosystem is created through which of the following options?
- (a)
By the natural cycles only
- (b)
By the interactions between animals only
- (c)
By the interactions between organisms and the environment
- (d)
By the interactions between plants and animals only
Which of the follo~ing consequences is/are due to uncontrolled deforestation
(i) The destruction of habitats (ii) Landslides (iii) Flooding |
- (a)
(i) only
- (b)
(i) and (ij) only
- (c)
(ii) and (iii) only
- (d)
(i), (ii) and (iij
Which of the following must be practised to preserve and conserve the environment
- (a)
Deforestation
- (b)
Recycling and afforestation
- (c)
Soil erosion
- (d)
Increase in pollution
Plants and ani~als maintain the balance of oxygen and carbon dioxide in the air
Which of the following processes I represents X and Y
- (a)
X Y Respiration Transpiration - (b)
X Y Transpiration Decay - (c)
X Y Photosynthesis Respiration - (d)
X Y Decay Photosynthesis
Which of the following include all living organisms and all life supporting regions of the earth
- (a)
Biosphere
- (b)
Ionosphere
- (c)
Stratosphere
- (d)
Lithosphere
Chipko movement is concerned with which of the following processes
- (a)
Conservation of natural resources
- (b)
Plant/forest conservation
- (c)
Plant hybridization
- (d)
Environmental pollution
Which of the following processes is/are prevented by step farming?
- (a)
Soil erosion
- (b)
Deforestation
- (c)
Afforestation
- (d)
All of these
Under which headings can flora and fauna be considered
- (a)
Renewable and non-living resources
- (b)
Non-renewable and living resources
- (c)
Living resources.
- (d)
Non-renewable and non-living resources
How does our government protect the rainforests of our country
(i) Prohibits the felling of trees. (ii) Trees that have been chopped down are replanted (iii)Discourages the use of pesticides in agriculture |
- (a)
(i) and (ii) only
- (b)
(i) and (iii) only
- (c)
(ii) and (iii) only
- (d)
(i),(ii) and (iii)
Which statement is correct
- (a)
Plants and animals in a forest do not depend on one another
- (b)
Forests has no influence on the climate and water cycle.
- (c)
Forests protect the soil from erosion
- (d)
Soil has no influence on plants
The insects, butterflies, honeybees and birds help flowering plants in which of the following processes
- (a)
Fertilisation
- (b)
Pollination
- (c)
Cultivation
- (d)
Conservation