Answer:
obsidian
Explanation:
because it is an igneous rock which is smooth
Answer:
pooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooop
Explanation: fart
That would be an endothermic reaction! :)