Earth's Magnetic Field
How Earth's Magnetic Field affects compasses
Compass
hold the compass in the palm of your hand at waist level, turn so the needle and needle outline are lined up, turn the housing until your desired direction aligns with the direction of travel arrow on the base plate, hold the compass in front of you and turn until the floating arrow tip lines up with the N on the housing Adjust for declination, and then hold the compass in front of you, turning until the floating arrow lines up with the N on the housing, and walk, following the direction of travel arrow.
Compass Diagram
Explanation of a compass
a compass is an instrument for determining directions, as by means of a freely rotating magnetized needle that indicates magnetic north.
How does the Earth's magnetic field affect a compass
The needle of a compass is a magnet that lines up with the earth's magnetic field
How Compass works -Magnetism Lesson for Kids