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View compareExtreme Earth: Landforms, Mapping & Earth's Spheres Adventure
Free classroom Dig Kits. Every adventure on this page is free forever. The kits that go with them are $15 a student — and for every one sold we donate one to a school.
Get free kits for your classAdventure 06 · Landforms, Mapping & Earth's Spheres · Grades 2–5
Extreme Earth
A frozen upper realm of ice halls and glowing ceilings, where every chamber holds a record — highest, deepest, coldest. Six stops, six problems to put right, six Digs to recover. Free, no logins, no accounts. Led by Landling, the Realm's hero Adventureling.
Assigning one stop
- Every stop has its own address. Stop 4 is
/pages/extreme-earth#stop-4— paste it straight into Google Classroom. - Progress is remembered on the device, so a class can do one stop a week and pick up where it left off.
- Each stop runs 10–15 minutes. The finale needs all six done first.
The six stops
1. The Fern GrottoA map's key explains its symbols. Blue means water, green means plants, and brown contour lines join ground that is all the same height.2. Ice CathedralEarth's parts are called spheres. The geosphere is rock and soil, the hydrosphere is all the water and ice, the biosphere is every living thing — and the air is the atmosphere.3. Sparkle SlopeContour lines join points at the same height. Where they crowd together the slope is steep. Where they spread apart it is gentle.4. The Aurora CeilingThe atmosphere is layered. Weather happens in the troposphere, jets cruise in the stratosphere, meteors burn up in the mesosphere, and the aurora glows in the thermosphere.5. The Compass ChamberEarth has four layers: crust, mantle, liquid outer core and solid inner core. A compass works because the moving liquid outer core makes Earth magnetic.6. The Glowworm CeilingEarth's records: Mount Everest is the highest point above sea level, Challenger Deep in the Pacific is the lowest, and the coldest temperature ever recorded was in Antarctica.
What the kit adds
The adventure is free and always will be. The Extreme Earth kit
adds the part a screen cannot do: six real specimens, six Digs that come sealed with the label scratched off,
six Gemlings in a blind bag, and the printed map with Landling on it. Finish a stop online and that location's
Dig is yours to open for real.
Finished Extreme Earth? The online adventure is the half you can do today. The other half is a real specimen in your hand — six of them, one per stop, sealed in a Dig with the label scratched off.
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