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Ari Raider's Training Materials · Extreme Earth · Training Center 5 of 6
Earth's Layers & Magnetism
Every compass in the Compass Chamber is spinning. A compass points north because of what's under our feet — set the layers in order and the needles settle.
What you're training for
In the Compass Chamber, lodestone veins have every needle confused. They settle for whoever can order Earth's layers from the outside in. Train here first; prove it in the simulation.
The science
- From outside in: crust (thin rocky skin), mantle (hot rock flowing very slowly), outer core (liquid metal), inner core (solid metal).
- The churning liquid outer core is what makes Earth a giant magnet — no liquid metal, no compass.
- Lodestone (magnetite) is naturally magnetic rock — the mineral the first compasses were made from.
- The field does real work: it deflects solar particles, and where they funnel in at the poles, they light the aurora.
Teach it today — one magnet, one compass
Confuse the needle. Set a compass on the table — it finds north. Slide a bar magnet nearby — the needle swings to obey the closer, stronger field. Now the question that lands the lesson: what does that make the Earth? A magnet so large the needle obeys it from everywhere — powered by liquid metal thousands of miles down.
Trained and ready? Prove it at Stop 5 — the Compass Chamber. Free, no logins, progress saved on the device.
Enter the Realm at Stop 5Resources in this training center
Worksheets, reading passages, flashcards and printables for this lesson are being added — new resources land here first. Get one email a month when they do, or browse the whole free library.
The hands-on half: the Extreme Earth Adventure Kit puts six real specimens — lodestone included — plus six Digs, six Gemlings and the Realm map in your students' hands. $19.99, or $15 a student for classrooms.
More Extreme Earth training
Map Symbols · Earth's Spheres · Contour Lines · Atmosphere Layers · Layers & Magnetism · Earth's Records · Enter the Adventure →