Who is Archduke Francis Ferdinand?

Overall cooling of earth's climate causes

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.

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called