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प्रश्न
What are renewable energy resources?
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उत्तर
Renewable energy resources are those that come from natural sources and are naturally replenished. These include solar energy (sunlight), wind energy from windmill (wind), hydroelectricity (rain), tidal energy from waves (tides), and geothermal energy (energy from the heat of the earth).
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संबंधित प्रश्न
Fill in the following blank with a suitable word:
The amount of heat produce by burning a unit mass of a fuel completely is known as its ............ value.
What is the difference between a renewable and a non-renewable source of energy? Explain with examples.
Which of the following fuels has the highest calorific value?
(a) natural gas
(b) methane gas
(c) hydrogen gas
(d) biogas
Most of the fuels contain carbon as one of the constituents. Name a fuel which has very high calorific value but not contain carbon.
Name any one hydrocarbon fraction obtained during the fractional distillation of petroleum which is used as a domestic fuel.
What are fossil fuels? Give three examples of fossil fuels.
Explain how, sun is considered to be the ultimate source of fossil fuels
The aviation fuel which is used in the engines of jet aeroplanes is:
(a) diesel
(b) kerosene
(c) petrol
(d) CNG
What is the function of anaerobic micro-organisms such as anaerobic bacteria in a biogas plant?
The fuel which is not obtained from biomass is:
(a) firewood
(b) cow-dung cakes
(c) coke
(d) charcoal
Which of the following is ultimately not derived from the sun's energy (or solar energy)?
(a) wind energy
(b) nuclear energy
(c) biomass energy
(d) ocean thermal energy
Choose the correct answer.
Windmills have been used for many centuries in
State whether the following is True or False.
China, the USA, and Spain are major producers of wind energy.
State whether the following is True or False.
Coal takes millions of years to form.
Can you tell?
What is ‘green energy’?
Can you tell?
What are the non-conventional energy resources?
Can you tell?
Which forms of energy from the sun are used in solar energy devices?
Higher Order Thinking Skill (HOT)
What are the objectives for replacing non-conventional energy resources from conventional energy resources?
What are the environmental consequences of using fossil fuels? Suggest the steps to minimise the pollution caused by various sources of energy including non-conventional sources of energy.
Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources.
| air, coal, natural gas, sunlight, petroleum, minerals, forests, oxygen |
