A Flying Teabag

Tea Bag Rocket Experiment.
In literacy we had to write an explanation on an experiment that we did. Flying tea bags.
Here is my explanation:

Did you know that if you light a tea bag on fire it will fly up into the air ;however, it has to be done
a certain way. Here is why and how that happens.

The main word to remember is density. This is when something is lighter and less dense
or heavier and far more dense. The tea bag burns downwards because it’s looking for the easiest
molecules to burn. When you light the top of the tea bag on fire (when it is standing upright) the
air inside the tea bag it becomes hot and less dense. Because of this the cold air around it rushes
to the bottom.  The less dense hot air, still inside the tea bag rises because of the cold air pushing
it upwards.

           

The hot air rises and flies into the air just like a hot air balloon. This is a very cool reaction and a very easy to do.  

This was my explanation on flying tea bags.
Please let me know in the comments some feedback about my language and punctuation!