The Two Elements Silicon and Oxygen, Taken Together, Make Up

Q49: Gas, lava, and _ are the three

Q50: Which of the following scientists is generally

Q51: The hardest mineral on the Mohs hardness

Q52: Laccoliths and sills are examples of _

Q53: Intrusive igneous rock formations that cut more

Q55: The brilliancy of a gem is a

Q56: The physical characteristic that is used to

Q57: Molten rock material on Earth's surface is

Q58: The term cleavage refers to the tendency

Q59: The study of rocks is called<br>A) petrology.<br>B)