What units are used in the standard system

What is the difference between an igneous, sedimentary and metamorphic rock

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone