The presence of a magnetic field is a good indication that the Earth:
A. has a liquid metal outer core, spinning rapidly as it rotates.
B. a huge iron meteorite lies somewhere high up in the mantle, not in the core.
C. the Earth's interior has had time to solidify, with a rigid bar magnet created.
D. the Earth's interior must be completely molten to the center.

What group has historically made up the largest portion of immigrants in mexico?

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 european union was formally established in