EARTH MAGNETISM

#1. When is the magnetic compass most effective?

• A In the region of the magnetic South Pole.
• B In the region of the magnetic North Pole.
• C About midway between the magnetic poles
• D On the geographic equator

#3. What is the definition of magnetic variation?

• A The angle between the direction indicated by a compass and Magnetic North.
• BThe angle between True North and Compass North.
• C The angle between Magnetic North and True North.
• DThe angle between Magnetic Heading and Magnetic North.

#4. At the magnetic equator:

• A Dip is zero
• BVariation is zero
• CDeviation is zero
• D The isogonal is an agonic line