Energy around us
What is energy

Energy is all around us. The energy causes things to happen around us. Energy is the ability to do work.
- What is energy
- Energy type
- Energy principles
Energy sources

Some energy sources can be used directly, as they appear in the natural environment, but some of them need to be …
- primary energy sources
- secondary energy sources
- renewables energy sources
- conventional energy sources
Energy form

There are different forms of energy, but there are only two main types of energy.
- Energy forms
- Energy facts
- Daily energy