Which statement is true regarding Earth's magnetic field?

• A. Field lines enter Earth near the North Pole.
• B. The magnetic pole near Antarctica is a north pole.
• C. Compasses point toward a magnetic pole that is a north pole.
• D. A compass can lead a hiker to the geographic North Pole.

Answer: (A)

The statement that field lines enter Earth near the North Pole is accurate concerning Earth's magnetic field. Earth's magnetic field is akin to a giant bar magnet tilted with respect to the rotational axis of the Earth. In this model, the magnetic field lines emerge from the magnetic south pole, which is located in the Northern Hemisphere, and enter back into the Earth at the magnetic north pole, located in the Southern Hemisphere. This positioning is crucial for understanding how compasses work, as they align themselves with these magnetic field lines, pointing toward the Earth's magnetic north pole, which is opposite to the geographic North Pole.

Thus, the statement about field lines entering near the North Pole accurately describes the relationship between the Earth's magnetic field and its poles. The other statements misrepresent the properties of Earth's magnetic field and compass behavior in relation to Earth's geographic and magnetic poles.