What is Energy?

Energy is the ability to do something, whether it's movement, sound, lighting, heating or cooling. 

Energy comes in many different forms - heat; light; electricity; chemical; nuclear; kinetic; and sound. 


Types of Energy

There are two different kinds of sources of energy that we use to power things: renewable energy and non-renewable energy.

Renewable Energy

Renewable energy sources come from things that do not run out, and that we can use again and again. Renewable sources include:

  • Solar energy from the Sun,
  • Wind energy,
  • Hydro power from water turbines near a resevoir,                                                                           
  • Biomass from plants,
  • Geothermal energy from underground
modern-windmill llwyd 128 

We're all encouraged to make more use of renewable energy sources, as they're less damaging for our planet.                                                                                                 

Non-renewable Energy

Most of our energy comes from non-renewable sources. One day, non-renewable energy sources will run out and we will not be able to create more.

mine-cart llwyd 128    

These include fossil fuels (oil, gas and coal). They are named fossil fuels as they are created from animal and plant matter being compressed over millions of years.

Another non-renewable energy source is Uranium. Uranium atoms are split into smaller atoms to create electricity in Nuclear Power Stations (such as Wylfa and Trawsfynydd), in a process called nuclear fission.

We are encouraged to use less non-renewable energy sources, especially fossil fuels, as they are depleting.                                                                          


Next page - Where does energy come from?

Icons made by Freepik and Gregor Cresnar from www.flaticon.com

Cyngor Carbon Isel > Gwynedd Carbon Isel

Contact us

01286 679266

Energy Conservation Unit, Council Offices, Shirehall Street, Caernarfon, Gwynedd LL55 1SH