Energy Sources and the Environment Chapter 8 Review Answers
We take learned almost various types of energy in our previous sessions. The Sunday is the main source of energy on Earth. There are other sources of energy similar coal, geothermal energy, wind energy, biomass, petrol, nuclear energy, and many more. Free energy is classified into diverse types based on sustainability as renewable sources of energy and not-renewable sources of free energy. Allow us know more about various sources of energy.
What is Free energy?
Before learning most natural sources of energy, let's understand what energy is. The classical clarification of energy is the ability of a organization to perform piece of work, but because energy exists in and then many forms, it is hard to detect one comprehensive definition. In brusque, free energy is the ability of a organization to make things happen. It is a property of an object which tin can be transferred from the object to an object or converted to unlike forms simply cannot exist created or destroyed. There are numerous sources of energy. It can exist chemic free energy, electrical energy, estrus/ thermal energy, mechanical energy, nuclear energy, and energy in the form of electromagnetic radiation i.e. light.
Sources of energy contain free energy in them if forms that cannot be used directly but living organisms crave free energy to stay live. Therefore, y'all must unlock this free energy to get work washed. Humans get energy from food which has this energy stored in the form of chemic energy. Your body absorbs this energy from food and burns it to fuel your trunk then that you tin run effectually and have fun. A candle has chemical energy stored in it, but it has to be burnt to be useful . This conversion of chemic energy to yield rut and low-cal energy happens through burning. Burning is a process of converting chemical energy to rut energy and sometimes light too.
We must brand 1 ascertainment, though energy seems to have a shelf life. If yous keep a hot object out in the open, it will cool later on a while. Tin can you lot collect this energy back from the atmosphere? You will learn more about the menses of free energy when you discuss the Laws of Thermodynamics. We have discussed a few sources now let's discuss them in particular.
Sources Of Free energy
Sources of energy tin be classified into:
- Renewable Sources
- Non-renewable Sources
A renewable source is the natural resource that crusade no bear upon to nature. Renewable sources of free energy are bachelor plentiful in nature and are sustainable. These resources of energy can be naturally replenished and are safety to the surroundings.
Examples of renewable sources of energy are: Solar energy, geothermal energy, wind energy, biomass, hydropower and tidal free energy.
Non-renewable sources of energy cause bear upon to nature and are a express supply source. Not-renewable sources can be extracted from the earth, and will run out as time passes.
Examples of non-renewable sources of energy are: Natural gas, coal, petroleum, Nuclear energy and hydrocarbon gas liquids.
Divergence Betwixt Renewable and Non-renewable Sources of Energy
| Renewable | Non-renewable |
| The resource that tin can be renewed or replaced are called renewable sources of energy. | The resources that cannot be renewed once they are consumed are called non-renewable sources of free energy. |
| These resources practise non cause any pollution to the surroundings. | These resources cause pollution to the surroundings. |
| Renewable resources are inexhaustible. | Non- Renewable resources are exhaustible. |
| Renewable resources are not afflicted by man activities. | Non- Renewable resources are affected past human activities. |
| Examples of Renewable resources- Air, water and solar free energy | Examples of Renewable resources- Mineral, oil, and Coal |
Natural Sources of Energy
The natural resources effectually us provide a variety of sources of energy effectually us. During the stone age, it was wood. During the iron historic period, nosotros had coal. In the modern age, nosotros have fossil fuels like petroleum and natural gas. So how do we choose sources of energy?
Expert sources of energy should have the following qualities:
- Optimum heat production per unit of measurement of book/mass used
- Easy to transport
- Least Polluting
- Economical
Earlier coal was used pretty much everywhere, from domestic used to steam engines all the way to Titanic. Ane problem that coal faced was transporting large amounts of coal needed all around the world. Hence, at present the world over energy use is shifting towards either diesel fuel or electricity. This example shows how petroleum is ameliorate confronting coal on all the above parameters.
Types of Natural Sources of Energy
There are 2 types of natural sources of energy classified by their popularity and use,
- Conventional Sources of Energy
- Non-Conventional Sources of Energy
Divergence Between Conventional and Not-Conventional Sources of Energy
| Conventional | Non-conventional |
| The resources which accept been in use for a long fourth dimension. | The resources which are yet in the procedure of development over the by few years. |
| These resource are exhaustible. | These resources are inexhaustible. |
| These resource cause pollution equally they emit fume and ash. | These resources are usually pollution-free. |
| These resource are very expensive to exist maintained, stored and transmitted. | These resources are less expensive due to local use and tin easily exist maintained. |
| Examples- coal, natural gas, petroleum, and water power. | Examples- solar, biomass, wind, biogas, and tidal, geothermal. |
In this article, you learned about the natural resources, energy, the sources of energy and what makes a skillful source of energy. Explore more such articles at BYJU'S which provides detailed solutions to the questions of NCERT Book for source of energy so that 1 tin can compare their answers with the sample answers given for this chapter.
Read more about: different types of energy .
Frequently Asked Questions – FAQs
What sources of free energy are renewable?
Following are the sources of energy that are renewable:
- Biomass energy
- Wind energy
- Tidal energy
- Hydro energy
What is the main source of energy in Bharat?
When commercial purposes are considered coal, oil, and natural gas are the primary source of energy in Republic of india.
What are the sources of energy in India?
Post-obit are the sources of energy in India:
- Coal
- Natural gas
- Thermal free energy
- Mineral oil
Can any source of energy be pollution-free?
No, the source of free energy cannot be pollution-gratuitous as it affects the environment in some way. For example, solar energy can exist considered as pollution-free but the installation of the setup volition crusade harm to the environment.
What are the advantages and disadvantages of wind power?
Advantages:
- At that place are no harmful gases released into the surround.
- Information technology is a fashion for the generation of revenue in the local communities.
- It is ane of the make clean sources of energy.
Disadvantages:
- The storage of energy needs to be improved.
- The initial fix requires a lot of investment.
- Numerous lands volition be used up.
List the examples of sources of energy
Post-obit are the examples of sources of energy:
- Biofuel energy
- Hydropower
- Geothermal energy
- Solar energy
- Nuclear free energy
- Tidal energy
- Wind energy
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