Let's review what energy is!

As you all may know, energy produces all the changes around us, so if a body has energy, it can produce changes.
There are different types of sources of energy: renewable sources of energy, and non-renewable sources of energy.

Renewable sources of energy:

• The Sun.
• Wind .
• Water in motion.
• The Earth.

Non-renewable sources of energy:

• Fossil fuels like Natural Gas, Oil and Coal.
• Nuclear Energy.

Search the web!

In the following link you'll learn more about energy: http://tonto.eia.doe.gov/kids/energy.cfm?page=about_home-basics

In the following link, you'll learn more about each of the different sources of energy: http://tonto.eia.doe.gov/kids/energy.cfm?page=2

Now that you know almost everything about energy and the sources of energy, try to answer this question: How was gas formed?