Earthquakes
Earthquake Epicenter Finder
Read three seismograms, turn each S–P lag into a distance and triangulate where an earthquake began.
All labs
Earth science simulations
Each lab is a small, working model of the Earth system. Change the conditions, see how Earth responds, and check your thinking against the numbers. Every lab comes with a one-page classroom activity and an answer key.
Plate tectonics
Plate Tectonics Explorer
Pull plates apart, push them together or slide them past each other, and see which landforms, volcanoes and earthquakes form.
Maps and landforms
Contour Map Playground
Sculpt hills, valleys and volcanoes and watch the topographic map redraw, then read slopes, rivers and cross-sections.
Rivers and erosion
River Erosion Sandbox
Tilt a stream table, choose the sediment and turn up the water, then watch a river cut its channel, build point bars and a delta, and read why on the Hjulström diagram.
Water cycle
Water Cycle Explorer
Follow a water droplet through oceans, clouds, ice, soil and groundwater, see where Earth’s water is stored, and switch off the sun or gravity to see what drives the cycle.
Rocks and minerals
Rock Cycle Builder
Melt, cool, weather, bury and squeeze rocks to see how granite becomes slate or magma becomes marble, and where inside Earth each change happens.
For teachers
Every lab runs in the browser on Chromebooks and tablets, with no accounts. The teacher page has the activities, answer keys, a 10–15 minute lesson plan for each lab and the standards they connect to.