Which of the following produces carbon dioxide when it is heated in industry and when it moves back below the Earth's crust?
Ore
Fossil fuel
Sediments
Limestone
Which of the following statements is true?
Since the gases in the air posses different melting point, they can be separated using the fractional distillation method .
Since the gases in the air posses different freezing point, they can be separated using the fractional distillation method .
Since the gases in the air posses different boiling point, they can be separated using the fractional distillation method .
Since the gases in the air posses different density, they can be separated using the fractional distillation method .
Glucose + Oxygen → CO2 + H2OWhich process is this ?
Combustion
Photosynthesis
Respiration
Transpiration
How much percentage of nitrogen present in the atmosphere is unreactive?
73
78
75
76
Percentage of carbon dioxide content in the atmosphere.
0.05
0.01
0.02
0.04
Methane is produced by:
Cows
Rice paddy fields
Termites
All the above
Which of these renewable resource is used to generate electricity?
Wind energy
Hydel energy
Solar power
All of the above.
Which of the following is caused by gases in the air, chiefly carbon dioxide and methane?
Photochemical smog
Acid rain
Global warming
Denitrification
During the process of photosynthesis , plants use energy from the:
Atmosphere
Sun
Fossils
Earth's crust
When animals and plants die and rot away or buried,they slowly form:
Fossil fuels
Biomass
