The speckled appearance of a rock is called a rock's

fracture

luster

color

grain

Which of the following is a reason why people are vacationing in slovakia

How did the europeans design the national borders of africa? why?

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.