Follow air, water and energy through familiar places. Test a model, inspect a real observation and keep their different limits in view.
Interactive explorationWatch real lava feed a channel. Take apart a gas-volume calculation, compare Mount St. Helens through time, inspect volcanic rock under a microscope and explore an actual surveyed crater.
Interactive explorationStep through real satellite observations, release an air parcel into a measured atmosphere, and discover why moisture, lifting and the surrounding air all matter.
Interactive explorationOpen a room, plan when to exchange its air, and lift the cover off a particle filter. Follow the mass, inspect real observations, and discover what an AQI number can—and cannot—tell you.
Interactive explorationFollow water above and below the surface. Pave part of the land, change evaporation, and watch the water budget rearrange.
Interactive explorationFreeze two model temperatures, change infrared transfer and release time. Follow every energy route, move the accounting boundary and compare the model with real atmospheric evidence.
Interactive explorationOpen a leaf, explore a chloroplast, and supply a tiny carbon-building recipe. Discover what comes from air, what comes from water, and what light contributes.
Interactive explorationPull a ridge apart over millions of years. Read the age and magnetic pattern left behind, then compare spreading, sliding and subduction.
Take these steps at your own pace. Your place is not saved as account progress or scored.