Beam Drip
Learning hub
The water cycle, explained properly.
Everything the game teaches, with the reasoning behind it and the sources underneath it. Written for curious players, and for teachers who want to know where a claim came from before handing it to a class.
The cycle has five steps, not four
Most classroom diagrams show four. The fifth is the one that explains why a snowbank shrinks on a dry day that never rises above freezing.
Evaporation
Liquid water absorbs enough energy to become vapour and rise. The sun does this constantly, mostly over the oceans.
Condensation
Vapour cools as it rises, and turns back into tiny liquid droplets around specks of dust. That is what a cloud is made of.
Precipitation
Droplets merge until they are too heavy to stay aloft, and fall as rain, snow or hail depending on the temperature on the way down.
Collection
What lands gathers in oceans, lakes, rivers and groundwater, ready to evaporate again. The cycle has no beginning and no end.
Sublimation & deposition
Ice can become vapour without melting first, and vapour can become ice without becoming liquid. This is why frost appears on a clear night, and how a snowbank disappears while staying frozen.
Test your knowledge
A sample from the game's question set — sixty-six questions across twenty-two topics, each one checked against a cited source. Pick an answer to see why.
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Want the whole set? The printable quiz has all sixty-six.
Why the game is built this way
Every rule in Beam Drip is a physical claim. These are the ones worth saying out loud.
Ice takes time, water does not
Rain lifts the instant the beam touches it. Snow and hail must sit in the beam first. That is latent heat of fusion — ice has to absorb energy to become liquid before any of it can evaporate, and that energy does not raise its temperature while it is doing the melting.
Frozen precipitation carries more water
A missed snowflake or hailstone fills the pond about four times faster than a missed raindrop. Hail in particular packs a great deal of water into one falling object.
The storms are a go/no-go task
Red drops must be avoided while everything else must be chased. That pairing is a go/no-go paradigm, a standard way of exercising inhibitory control. In the harder worlds the palette shifts until ordinary drops resemble the ones to avoid, adding Stroop-like visual conflict to the same split-second decision.
Peace mode is not easy mode
No storm drops fall at all and the round cannot be lost. It exists for players who find failure states stressful, and for classrooms that want the science without the arcade pressure. It keeps its own records, separate from the competitive ones.
Go deeper
Three pages that did not fit here.
Two worlds that run the same cycle without water
🪐 Titan — methane rain
Saturn's largest moon is the only other body in the solar system with stable liquid on its surface. At around −179 °C, methane fills the role water plays here: it rains, pools into lakes big enough to have names, and evaporates back into a thick orange haze. A complete three-phase cycle in a different substance. Read more →
🌋 K2-141b — rock vapour
A lava exoplanet about 200 light-years away, tidally locked so one side faces its star forever. That dayside is an ocean of molten rock roughly 100 km deep. Rock vapour rises from it, blows to the frozen nightside, condenses, and falls as stone — then flows back as lava. Evaporation, precipitation, collection, with silicates instead of water. Read more →
References
Nothing in the game is asserted without somewhere to check it. These are free to download, print and hand out.
🔎 Water cycle — references & study guide
Every water-cycle fact in the game, with the source behind it.
📄 Printable quiz
All sixty-six questions, ready to hand out.
🪐 Titan — references
The methane cycle, with measurements and missions cited.
🌋 K2-141b — field guide
The rock-vapour cycle on a tidally locked lava world.