Develop an argument that evaluates the extent to which the decline of states led to cultural or social changes during this period.

The most direct route from south america to asia is across the ocean.

Some fossils provide evidence to suggest that earth's climate has changed over time. which information can scientists obtain from these fossils? check all that apply

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called