Why Is Earth's Center Composed of Heavy Iron and Nickel

question 66

Multiple Choice

Why is Earth's center composed of heavy iron and nickel?

• A)because the temperatures in the center are high enough to form those metals
• B)because the heaviest elements settled to the center while Earth was forming
• C)because there is great pressure at the center of Earth
• D)because the center of Earth formed earlier than the outer layers.

---

Definitions:

Ebbinghaus

Refers to Hermann Ebbinghaus, a German psychologist known for his research on memory and the forgetting curve.

Forgetting Patterns

The ways in which the ability to recall or recognize previously learned information decreases over time.

Source Monitoring

The process by which individuals determine the origins of memories, knowledge, or beliefs.

Reality Monitoring

The process of distinguishing between memories of actual events and those of imagined events.