Thursday, September 11, 2014

Oxygen


Oxygen might just be the most important element for humans on the whole planet.

The air we breathe has oxygen that goes into our lungs, which is carried off to parts of our body in our blood.

Water is made up of the chemicals hydrogen and oxygen.

When you burn wood in a fireplace, the fire needs oxygen to keep burning.

And remember that all elements can be gas, liquid or solid depending on how hot or cold they are?

Liquid oxygen is super cold, almost -300 degrees!
When we sent a space shuttle up into outer space, we used a huge tank full of liquid oxygen to burn because it is such great fuel.
oxygen
(from: wikipedia - oxygen)


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