Geodesists define the geoid as:. a. a mathematical shape that lies just below the lowest point on Earth. b. the gravitational surface upon which water would rest. c. the reference point for geodetic surveys. d. the coordinate system by which land parcels are subdivided.

Why are fossils of organism's from the phanerozoic eon much more likely to be found than fossils of organisms from any other eon? a. more organisms present during the phanerozoic eon had soft body parts. b. organisms present during the phanerozoic eon were all microscopic. c. more organisms present during the phanerozoic eon had hard body parts. d. organisms present during the phanerozoic eon are the most ancient life forms.

The larges lakes in the world are found in: asia europe north america south america

Ozone in the upper atmosphere has been depleted by a. sulfur dioxide. b. chlorofluorocarbons. c. carbon dioxide. d. oxygen.