The Importance of Energy

Many people think that we should find ways of being less wasteful with our energy. These could include greater use of public transport and bicycles instead of cars, better insulation in our homes, manufacturing goods that last longer before they are thrown away, and recycling more of our waste materials.

The Importance of Energy

By Mr Ghaz, November 3, 2010

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The Importance of Energy

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Our bodies depend on energy, as do our homes, vehicles and factories. On Earth, the Sun is the source of nearly all of our energy. Without energy, nothing would live, move or change. It is hard work pedaling uphill or moving heavy objects about. To scientists, work is done whenever a force makes something move. The greater the force and the further it moves, the more work is done.

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If something has energy, it means that it is capable of doing work. An engine uses the energy in its fuel to move a car along. A battery can store the energy needed to turn an electric motor. And some winds carry enough energy to blow trees over. Hot things also have energy. In any material, the tiny particles (atoms) of which it is made are always on the move. Heating the material makes its atom move faster.

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Scientists measure energy in joules (J). A litre of petrol stores about 35 million joules. But this energy is not a ‘thing’. It is just a measure of how much work can be done. The energy can be used to produce motion that you can see (such as a car speeding up) or tiny movements that you cannot see (like the atoms moving more quickly when something gets hot).

Changing Forms

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Energy can exist in many different forms. Things that are moving, such as cars and winds, have kinetic energy. Spring or other stretched or compressed materials have potential energy. So does anything in a position where it can fall. When hot materials cool down, they give off heat, or thermal energy. Foods, fuels and batteries store chemical energy-their energy is released by chemical reactions. Light and sound are types of radiant energy. Electric currents carry electrical energy. And energy that comes from the nucleus (centre) for an atom is called nuclear energy.

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17 Responses to “The Importance of Energy”
  1. giftarist Says...

    On November 3, 2010 at 5:49 pm

    Very interesting and highly informative article, friend.

  2. Brewed Coffee Says...

    On November 3, 2010 at 6:48 pm

    Thank you for a well discussed article, systematic and easy to understand. A good reviewer for me :-)

  3. keepithandy Says...

    On November 3, 2010 at 7:06 pm

    Very informative article, highly accurate, thought out & researched, great pictures too, thanks for sharing this Mr Ghaz

  4. albert1jemi Says...

    On November 3, 2010 at 9:37 pm

    great share

  5. surymilan Says...

    On November 3, 2010 at 10:23 pm

    very nice read

  6. lowellpendon Says...

    On November 3, 2010 at 11:09 pm

    Interesting stuffs. Thanks for sharing.

  7. Rehoboth Says...

    On November 4, 2010 at 3:12 am

    $nice post$

  8. ronthoughts Says...

    On November 4, 2010 at 6:29 am

    Another energetic and remarkable write my friend. Thumbs up and stumbled!

  9. Christine Ramsay Says...

    On November 4, 2010 at 6:40 am

    A very impressive post. A good reminder to us all about conserving energy when we can.


  10. Anupatil Says...

    On November 4, 2010 at 6:43 am

    Very nice and well written.

  11. papaleng Says...

    On November 4, 2010 at 8:30 am

    another interesting post with highly informative data.

  12. SharifaMcFarlane Says...

    On November 4, 2010 at 9:53 am

    Mr Ghaz, does a ‘hot’(fancy) car have more energy? ;-)

  13. quiet voice Says...

    On November 6, 2010 at 9:53 pm

    Using that energy to ssay this was well worth reading. Take care.

  14. yes me Says...

    On November 7, 2010 at 8:20 pm

    A good share here cheers

  15. jennamazingg Says...

    On November 9, 2010 at 4:43 pm

    very nice share. ((:

  16. revivor Says...

    On November 29, 2010 at 7:02 am

    what will run out first? many now think it will be water and thus our quest for energy will be of no avail – unless we can master desalination…

  17. Nikolaos Skordilis Says...

    On December 5, 2010 at 7:15 pm

    Excellent article!
    The energy issue is indeed the most important we will have to face this century..

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