Definition

The magnetic field that surrounds the Earth and is caused by the movement of molten iron in its outer core.

Example

Scientists study geomagnetism to understand how the Earth's magnetic field affects navigation and animal migration.

Conversation

Have you ever wondered about geomagnetism and how it affects us?

Not really, but it sounds interesting! What is it exactly?

It's basically the magnetism of the Earth and it influences navigation systems.

Wow, that's cool! I guess it plays a big role in how we find our way.

Synonyms & Antonyms

Root Explanation

Geomagnetism is formed from "geo-" (meaning earth) and "magnetism" (from Greek "magnetis" meaning magnet, derived from the region of Magnesia where magnetic stones were found). The word refers to the magnetic properties and phenomena associated with the Earth.

Memory Tip

Think of 'geo-' meaning earth and 'magnetism' relating to magnets — geomagnetism describes the magnetic forces of our planet.

Visually Confused Words