Which of the following represents the correct order of the phases of the moon?

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

What was the midwest states often called because they were located in the center of the nation

Which features are created on the exterior of a volcano when it erupts? check all that apply. vent crater hot spot lava flow boundary