Gloves are important to wear when working with what?

Abnormal softening of a gland is known as

The distribution of related animals and plants across the world

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?