In the diagram of Earth's magnetic field by Laticia, which correction is needed?

• A. The dashed line should be drawn in the same place as the solid line.
• B. The arrows to the left of Earth should point down.
• C. The arrows to the right of Earth should point up.
• D. The solid line should be drawn in the same place as the dashed line.

Answer: (C)

The main idea being tested is how magnetic field lines around a dipole are directed. For a dipole like Earth, lines emerge from the region that acts like the magnetic north and curve toward the region that acts like the magnetic south. If you look to the right of Earth in the diagram, the tangent to those curved lines is upward, so the arrows should point up. That’s why the needed correction is that arrows on the right side should point up.

Changing whether the line is dashed or solid doesn’t fix the overall direction of the field lines. And while symmetry would dictate the left side orientation as the opposite, the crucial correction focuses on getting the right-side direction correct to reflect the dipole pattern. Visualize the field lines as continuous curves looping from north to south; on the right-hand side their direction is upward.