How similar are comets, meteoroids and asteroids from each other ?

Which evidence is most likely used to indicate the beginning of solar system formation? a. materials combined to form a mass. b. materials were pulled together by gravity. c. water condensed and collected to form oceans. d. different species of microorganisms lived on earth.

Which are evidence of the seafloor spreading? a. molten material b. magnetic stripes c. continental material d. drilled core samples e. ocean water samples

Name the two rivers that run through the fertile crescent. how were the rivers both positive and negative to societies of the fertile crescent?