Aristotle first proposed that was at the center of the solar system. a. the sun c. earth b. the moon d. jupiter

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?