earthsmagnetism
nounUK /ˌɜːθs ˈmæɡnətɪzəm/
US /ˌɝːθs ˈmæɡnətɪzəm/
Earth's magnetism is the invisible force that makes a compass needle point north.
Sailors long ago used Earth's magnetism to find their way across the sea.
RELATED WORDS
OTHER MEANINGS
2. The magnetic field produced by Earth, which shields the planet from solar wind.
Earth's magnetism creates a bubble that protects us from harmful space particles.
3. The study of Earth's magnetic properties and how they change over time.
Scientists who study Earth's magnetism track how the magnetic poles slowly move.
4. The natural magnetic pull that helps animals like birds and sea turtles navigate.
Some animals sense Earth's magnetism to travel thousands of miles without getting lost.