The abiotic environment comprises the-: a. hydrosphere, lithosphere, atmosphere
b. natural and man -made environment
c. hydrosphere and atmosphere
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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.

Distance that lewis and clark traveled from st. louis to ft. clatsop near the pacific ocean.

In russia which of these challenges affects the transportation of both petroleum products and other goods?