9th Grade > Biology
NATURAL RESOURCES MCQs
Total Questions : 47
| Page 5 of 5 pages
Answer: Option A. ->
True
:
A
Humus is a major factor in deciding the soil structure because it causes the soil to become more porous and allows water and air to penetrate deep underground.
:
A
Humus is a major factor in deciding the soil structure because it causes the soil to become more porous and allows water and air to penetrate deep underground.
Answer: Option B. ->
denitrification
:
B
The nitrates which are formed by the process of nitrification are utilized by the plants. The excess nitrates in the soil are released back in the atmosphere as atmospheric nitrogen by denitrifying bacterias. This process is known as denitrification.
:
B
The nitrates which are formed by the process of nitrification are utilized by the plants. The excess nitrates in the soil are released back in the atmosphere as atmospheric nitrogen by denitrifying bacterias. This process is known as denitrification.
Answer: Option B. ->
Land
:
A, B, and D
Abiotic factors or components are mainly referred to all the non-living things in the biosphere. Air, land,water, sunlight are the examples of abiotic factors. These factors help in sustaining
life on Earth.
:
A, B, and D
Abiotic factors or components are mainly referred to all the non-living things in the biosphere. Air, land,water, sunlight are the examples of abiotic factors. These factors help in sustaining
life on Earth.
Answer: Option A. ->
True
:
A
The fossil fuels like coal and petroleum produces oxides of nitrogen and sulphur when they are burnt. These oxides are mixed up with rain water which give rise to acid rain.
:
A
The fossil fuels like coal and petroleum produces oxides of nitrogen and sulphur when they are burnt. These oxides are mixed up with rain water which give rise to acid rain.
Answer: Option C. ->
Water cycle
:
C
The whole process in which water evaporates from the surface of seas and oceans and falls back on land as rain and later flows back into the sea via rivers is known as water-cycle. This is one of the ways in which the water present on earth is circulated all over the Earth.
:
C
The whole process in which water evaporates from the surface of seas and oceans and falls back on land as rain and later flows back into the sea via rivers is known as water-cycle. This is one of the ways in which the water present on earth is circulated all over the Earth.
Answer: Option B. ->
combustion
:
B and C
Oxygen from the atmosphere is used for processes such as combustion and resipration. Oxygen is added up to the atmosphere by the process of photosynthesis. Transpiration is the process by which water is lost in the form of water vapour from the parts of the plants.
:
B and C
Oxygen from the atmosphere is used for processes such as combustion and resipration. Oxygen is added up to the atmosphere by the process of photosynthesis. Transpiration is the process by which water is lost in the form of water vapour from the parts of the plants.
Answer: Option B. ->
Lightning
:
B
Nitrogen fixation is an essential biological process by which nitrogen in the atmosphere is converted into ammonia. Lightning is one of the physical processes that convert nitrogen into oxides of nitrogen. These oxides then dissolves in water to form nitrates and fall on land along with rain.
:
B
Nitrogen fixation is an essential biological process by which nitrogen in the atmosphere is converted into ammonia. Lightning is one of the physical processes that convert nitrogen into oxides of nitrogen. These oxides then dissolves in water to form nitrates and fall on land along with rain.
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