Quiz: Earth's Geomagnetism

What causes the needle of a compass to point north?

• • Gravitational forces

• • Earth’s magnetic field

• • The compass battery

• • Wind direction

Earth’s magnetic field is generated by:

• • Earth's solid outer crust

• • The Sun’s magnetic influence

• • Movement of liquid iron in Earth’s outer core

• • The presence of bar magnets in Earth’s core

Which animals use geomagnetism to navigate?

• • Dogs

• • Bees

• • Cats

• • Horses

In a single magnet, magnetic field lines:

• • Flow randomly around the magnet

• • Loop from one pole to the other

• • Start and end at the same pole

• • Are invisible

Field lines connecting opposite poles of two magnets indicate:

• • Repulsion

• • Attraction

• • Isolation

• • No interaction

Tags

NGSS.MS-PS2-5

Earth’s magnetic poles are:

• • Aligned with the geographic poles

• • Always shifting positions

• • Reversed compared to the geographic poles

• • Aligned with the Sun’s position

• Which part of Earth’s structure is primarily responsible for its magnetic field?

• • Crust

• • Mantle

• • Outer core

• • Inner core

When two magnets are placed with like poles facing each other, they will:

• • Attract

• • Repel

• • Align

• • Neutralize

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

A compass needle points north because:

• • Earth's north pole attracts both ends

• • The magnetic north pole attracts the needle’s south pole

• • The compass needle is magnetized by sunlight

• • It is affected by the gravitational pull

How do scientists represent magnetic forces visually?

• • With colors

• • With field lines

• • With sound waves

• • With vibrations