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assignment - 5. planetary motion
attempt 1 of 1
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an ellipse has two focal points. one of the focal points is the

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.

Stages 1 and 4 of the demographic transition are similar in that

People make choices about how to use resources.