False or true: The upper and lower mantle are made out of Iron and nickel.
(I believe It is I'm just making sure Ima keep firing these questions btw)

What happens to rock when acid reacts with it?

Which of the following statements is most likely a characteristic of an authoritarian government in africa

You have been tasked with sorting the rock samples shown into three categories, with two rocks in each category. what attribute would you use to sort these rocks? which rocks would be in each category? rocks: obsidian, coquina limestone, granite, soapstone,pumice, and gneiss.