A
Because plants can absorb the sun`s energy to produce food
B
Because most green plants are tasty
C
Because most green plants eat other plants
D
Because most green plants are animal eaters
All food chains start with energy from the sun. This energy is captured by plants. Thus the living part of a food chain always starts with plant life and ends with an animal. Plants are called producers because they are able to use light energy from the sun to produce food (sugar) from carbon dioxide and water.
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Wrong Answered :
A
Acidic rain which corrodes marble
B
A large number of Fungi in the marble of the Taj Mahal
C
Yellowing of the marble on account of Soot particles
D
Smoke from the adjoining industries pollute the marble
Acid rain corrodes the marbles of monuments. The phenomenon is also called “Marble cancer”. Suspended particulate matter, such as soot particles emitted by Mathura oil refinery, has contributed towards yellowing of the marble. These two are the threat to the beauty of the Taj Mahal.
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Wrong Answered :
A
Cyclone seperator
B
Electrostatic precipitator
C
Catalytic converter
D
Wet scrubber
Catalytic converters are the devices which are fitted in the exhausts of the automobiles to decrease the pass out of harmful gases into the air.
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Wrong Answered :
A
Exosphere
B
Mesosphere
C
Stratosphere
D
Lonosphere
The ozone layer is the common term for the high concentration of ozone that is found in the stratosphere around 15–30km above the earth`s surface. It covers the entire planet and protects life on earth by absorbing harmful ultraviolet-B radiation from the sun.
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Wrong Answered :
A
Natural Gas
B
Petrol
C
Diesel
D
Coal
Heat is produced when C and H combine with oxygen (O) during combustion. Natural gas is primarily methane (CH4), which has a higher energy content relative to other fuels, and thus, it has a relatively lower CO2-to-energy content
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Wrong Answered :
A
Populations
B
Community
C
Ecosystem
D
Biosphere
An ecosystem is a natural unit consisting of all the living organisms in an area functioning together with all the nonliving, physical factors of the environment.
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Wrong Answered :
A
The pressure of the gas will be doubled
B
The pressue of the gas will be quadrupled
C
The pressure of the gas will remain constant
D
The pressure of the gas will be halved
The law itself can be stated as follows: For a fixed mass of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. ... Therefore, when the volume is halved, the pressure is doubled; and if the volume is doubled, the pressure is halved.
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