AP Environmental Science

Category - AP Environmental Science

What is the process by which dense materials sank toward the center of the Earth while less dense materials rose, thus developing layers in the Earth?
  1. Planetary diffusion
  2. Planetary differentiation
  3. Lithosphere development
  4. Mantle diffusion
Explanation
Answer: B - The process by which dense materials sank toward the center of the Earth while less dense materials rose, thus developing layers in the Earth, is planetary differentiation.

Key Takeaway: As the planet formed, dense, heavy materials sank toward the center of the Earth, while the less dense materials rose. This development into layers is known as planetary differentiation. The Earth is made up of several layers: at the center is the core (which includes the inner and outer core), then the mantle (comprised of the athenosphere), and lastly the lithosphere (made of the upper mantle and the Earth’s crust).
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