7th Grade > Chemistry
FORESTS OUR LIFELINE MCQs
Total Questions : 81
| Page 2 of 9 pages
Answer: Option A. -> True
:
A
Forests actas a natural absorber of rainwater and allows it to seep. When rainwater falls on leaves of trees and plants, it does not fall directly on the ground. It drips slowly on the forest ground and does not stagnate. Thus trees prevent flooding.
:
A
Forests actas a natural absorber of rainwater and allows it to seep. When rainwater falls on leaves of trees and plants, it does not fall directly on the ground. It drips slowly on the forest ground and does not stagnate. Thus trees prevent flooding.
Answer: Option C. -> Kerosene
:
C
Kerosene is not a forest product. It is refined from crude oil or petroleum which is found deep under the earth's surface. All the other products (matchstick, plywood, and paper) are obtainedfrom forestwood.
:
C
Kerosene is not a forest product. It is refined from crude oil or petroleum which is found deep under the earth's surface. All the other products (matchstick, plywood, and paper) are obtainedfrom forestwood.
Answer: Option B. -> nutrients
:
B
Decaying animal dung acts as a natural manure. It provides essential nutrients for the seedlings for their growth.
:
B
Decaying animal dung acts as a natural manure. It provides essential nutrients for the seedlings for their growth.
Answer: Option D. -> Diesel
:
D
Forests are a source of livelihood for humans and animals. They provide us with timber, medicinal plants, and also fruits and vegetables. Diesel on the other hand, is not obtained from the forests. It is extracted from petroleum or crude oil which is found deep under the surface of the Earth.
:
D
Forests are a source of livelihood for humans and animals. They provide us with timber, medicinal plants, and also fruits and vegetables. Diesel on the other hand, is not obtained from the forests. It is extracted from petroleum or crude oil which is found deep under the surface of the Earth.
Answer: Option A. -> Forests
:
A
A forest is a large area dominated by trees and is known as the 'green lungs'. Since, they absorbcarbon dioxidefrom the atmosphere and releaseoxygen during the day time. Oxygen is required for animal respiration. Thus,in this manner they maintainthe balance of these gasesin the atmosphere.
:
A
A forest is a large area dominated by trees and is known as the 'green lungs'. Since, they absorbcarbon dioxidefrom the atmosphere and releaseoxygen during the day time. Oxygen is required for animal respiration. Thus,in this manner they maintainthe balance of these gasesin the atmosphere.
Answer: Option B. -> Mushroom
:
B
Fungi likemushrooms, mildew, mold, etc., release enzymes that decompose dead plants and animals. They feed on these organisms and absorb nutrients from them.
:
B
Fungi likemushrooms, mildew, mold, etc., release enzymes that decompose dead plants and animals. They feed on these organisms and absorb nutrients from them.
Answer: Option D. -> Forests degrades the land.
:
D
Forests keep the surrounding air cool and help in bringing rain. Roots of trees hold the soil strongly. This prevents the soil from getting eroded by wind or water. Due to the presence of forest, the overall quality of land improves.
:
D
Forests keep the surrounding air cool and help in bringing rain. Roots of trees hold the soil strongly. This prevents the soil from getting eroded by wind or water. Due to the presence of forest, the overall quality of land improves.
Answer: Option B. -> canopy
:
B
The canopy looks like a roof over other plants in the forest. It is formed by the leaves ofan individual tall tree or by a group of trees.It restricts the sunlight and rains from getting to the layers beneath it.
:
B
The canopy looks like a roof over other plants in the forest. It is formed by the leaves ofan individual tall tree or by a group of trees.It restricts the sunlight and rains from getting to the layers beneath it.
Answer: Option A. -> True
:
A
Deforestation is the clearing of the Earth's forests on a massive scale. Forests provide habitat to a large number of species. On clearing the forests, they lose their habitat and start dying. Thus, many species can go extinct if forests are cleared.
:
A
Deforestation is the clearing of the Earth's forests on a massive scale. Forests provide habitat to a large number of species. On clearing the forests, they lose their habitat and start dying. Thus, many species can go extinct if forests are cleared.
Answer: Option B. -> soil
:
B
The decayed leaves and animal droppings in a forest act as manure for soil and thus improves its quality.
:
B
The decayed leaves and animal droppings in a forest act as manure for soil and thus improves its quality.
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