Which of these renewable resource is used to generate electricity?
Wind energy
Hydel energy
Solar power
All of the above.
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
By how much percentage is the amount of fresh water on the earth less than that of the total?
2
5
3
4
When animals and plants die and rot away or buried,they slowly form:
Fossil fuels
Biomass
During the process of photosynthesis , plants use energy from the:
Atmosphere
Sun
Fossils
Earth's crust
Glucose + Oxygen → CO2 + H2OWhich process is this ?
Combustion
Photosynthesis
Respiration
Transpiration
With which of the following alkaline substance is acid gases from power stations passed through to make the escaping gases much less harmful?
Lime
Sodium hydroxide
Water
Aluminium hydroxide
Photochemical smog is formed due to the release of which toxic gas?
Nitrogen dioxide
Carbon monoxide
Sulphur dioxide
Carbon dioxide
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
