Why doesn't Calcium Carbonate Burn? I was doing my Science Fair Project and I tried to burn Calcium Carbonate. But the match went out as soon as it touched the Carbonate. I am wondering why the Carbonate isn't burning. I later tried to use a torch and a lighter but nothing worked. My science fair project is due tomorrow and I've looked everywhere on the internet but nothing really explained why the calcium carbonate didn't ignite. 
Do I need HEAT or something like that to make it burn?
(I'm a 5th grader so please take it easy on me)
Calcium Carbonate cannot burn. Its already in its highest oxidation state (+2 for Calcium and +4 for Carbon), and cannot be oxidized (combusted) to a higher oxidation state. However, calcium carbonate does decompose on heating to quicklime and carbon dioxide.

$$\ce{CaCO3 -&gt; CaO + CO2}$$

This doesnt give out any flames in the first place.

Now let's talk about how to salvage your project. Why don't you try to heat the calcium carbonate, and show that carbon dioxide is evolved by using a burning match stick, or by using lime water? $\ce{CO2}$ extinguishes the burning flames and forms a milky precipitate with $\ce{Ca(OH)2}$ (limewater). This can be used to show that perhaps egg-shells and marble have carbonate content in them.