There is/are __ type(s) of extinction(s),
a. two / darwinian and mass
b. one / like when a meteor hit earth killing all the dinosaurs
c. one / caused by the inability to adapt to the environment

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?