ENERGY

Today we are going to start a new unit called: ENERGY.
Energy is the capacity of a body to perform transformations and do work.
But before we begin, I am going to answer some questions in this post and another questions in other post...
1. What is the difference between a form of energy and an energy source?
Well, some form of energy is present in all physical phenomena, in nature.
Energy sources are natural resources that we can use to generate different forms of energy and then we can transform that energy for various purposes. 

2. Can you name an energy source?                                                

Some energy sources are for example: Hydroelectric, coal or uranium.

3. What is a renewable energy source?

A renewable energy sources come from natural resources that we cannot use up completely. For example: solar energy.

4. where do oil, gas and coal come from?

They are fossil fuels.