Question

Lines drawn to join points of similar variation between the magnetic north and the true north are called _________________.

• A. isotherm lines
• B. isobar lines
• C. contour lines
• D. isotonic lines

Answer 1

The correct option is D isotonic lines

Lines drawn to join points of similar variation between the magnetic north and the true north are called isotonic lines.

Magnetic declination, or magnetic variation, is the angle on the horizontal plane between magnetic north (the direction the north end of a magnetized compass needle points, corresponding to the direction of the Earth's magnetic field lines) and true north.