Clicking with flint and steel on wooden blocks will of course burn them!
Or you can just waste wood and chuck it in lava...
If you need help on how to make flint and steel here is how to create it on a workbench:
/ = air
///
IRON//
/FLINT/
Minecraft doesn't...
No, glass does not burn in minecraft. But in an odd occasion i put glass over lava and it started burning.
You can't
Yellowstoney Stuff
Burn cactus in a furnace.
Yes. And Minecraft Beta 1.8 with crafting, furnaces, chests and stuff is called "Minecraft Beta" or "Survival Mode".
No, Creepers do not burn, the sun burns undead such as Zombies and Skeletons.
It is called minecraft because you mine stuff and craft stuff.
You will have to rebuild them.
burn stuff
Just delete the folder with your Minecraft server stuff and you're done.
Yes. Unless you put it out.