This rock is made from sand and pebbles joined together. the rock formed in a river bed. it is an example of rock.

a.) igneous
b.) metamorphic
c.) sedimentary

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 of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.

Which molecule is called "molecule of hereditary?