Question

which feature of the earth system is caused by the movement of ions in earths core?
a. weather
b. magnetic field
c. convection
d. layered geosphere

Explanation:

To solve this, we analyze each option:

• Option A: Weather is related to the atmosphere and factors like temperature, pressure, and moisture, not Earth's core ion movement.
• Option B: The Earth's magnetic field is generated by the movement of molten iron and other ions in the outer core (geodynamo effect). This matches the cause described.
• Option C: Convection in Earth's layers (like mantle convection) is due to heat transfer, not core ion movement for its primary cause.
• Option D: The layered geosphere (crust, mantle, core) is due to density differences during Earth's formation, not core ion movement.

Answer:

B. Magnetic field