What happens when physiological density is higher than arithmetic density?

Which tools are visuals that geographers use to interpret the world? choose all answers that are correct. question options: maps satellites graphs sensors

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.

Explain how a convection current in the earth is formed.