When the earth was large enough, it is believed to
have separated into layers with the densest layer in
the center (the core), the next dense layer in the
middle (the mantle), and the least dense layer at
the surface (the crust). What force caused earth's
elements and compounds to separate into layers?
A gravity
B impacts from planetesimals
c heat from the decay of
radioactive elements
D all of the above
The Palenie

D

Explanation:

The stratification of Earth into its geologic layers was brought about by the formation of the Earth's iron core. The iron core was generated by a combination of radioactive decay and gravitation, which raised the temperature enough for molten iron to form.

the one feature that all mediterranean countries have in common is that they border the mediterranean sea.

explanation:

the answer is b. apsidal precession