Question

3. Knowledge of the structure of Earth's interior allows scientists to develop the dynamo theory. A. What does the dynamo theory help explain? (2 points)

B. What is the composition of Earth's inner and outer core? (4 points)

C. How does the composition of the inner and outer core explain this theory? (2 points)

Answer 1

A. The dynamo theory helps explain the generation of Earth's magnetic field.

B. The inner core of the Earth is believed to be primarily composed of solid iron, while the outer core is composed of liquid iron and nickel.

C. The composition of the inner and outer core is critical to the dynamo theory. The Earth's magnetic field is generated by the motion of molten iron in the outer core. As the molten iron moves, it creates electrical currents, which in turn generate a magnetic field. The solid iron in the inner core is believed to help stabilize the magnetic field by providing a fixed reference point for the motion of the molten iron in the outer core. Without this stable inner core, the magnetic field of the Earth would be much weaker and more variable over time.

Step-by-step explanation: