Mars was once similar to earth in that

a.) it had only one moon
b.) liquid water flowed on its surface
c.) it showed evidence of plate tectonics
d.) its atmosphere had a thin layer of carbon dioxide

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 factor that affects biodiversity?

Forensic scientists think they know the identity of a skeleton. what rule should they use to select a relative whose dna could be used to try to confirm the identity?