Water Cycle: Teacher Manual

1. The first ten minutes

The tool opens on Explore with a live animated model running and a guided investigation offered at the top: "Where will the stormwater go? Follow a storm, change one land-cover setting, and explain the difference." That single prompt is a complete lesson, and it is the fastest way in.

1. Set the grade band (see section 2) before students touch anything. It changes the vocabulary throughout.
2. Press ▶ Start guide. The guided walkthrough steps through the system map one process at a time, in order, so nobody is hunting for where to click.
3. Stop at one process — Evaporation is the natural first — and read the Selected Process card together. It states the cause, the change of state, and what to look for on screen.
4. Ask the energy question. "Is energy absorbed or released here?" The card says latent heat absorbed for evaporation. Condensation releases it. This is the distinction most water-cycle lessons skip and the one that makes the cycle make sense.

The framing worth stealing for your own board work. The tool lays each process out as cause → water changes → look for, and separately names the water state, the energy, and the driver. Students who learn to fill that pattern in can do it for a process the tool never showed them.

2. Set the grade band first

Four bands sit in the learning-guide area: K–2, 3–5 (the default), 6–8 and 9–12. This is not a difficulty slider on the simulation — the physics is the same — it changes the language the tool uses to describe what is happening.

Practical guidance: pick the band your students read at, not the grade they are in. A sixth-grade class meeting latent heat for the first time is often better served by 3–5 language for the first pass, then the same screen again at 6–8 once the mechanism is in place. Running the identical model twice at two bands is a legitimate and effective differentiation move.

3. The five modes

🎯 Focus Canvas strips the surrounding interface for projection, and ⊕ Set baseline marks the current state so a later run can be compared against it. Both are worth showing students on day one.

4. The six processes, and the sentence students must finish

The cycle stages are numbered in the interface: 1 Evaporation, 2 Condensation, 3 Precipitation, 4 Collection, 5 Transpiration, 6 Infiltration.

Two of those six are the ones students most often cannot explain, and both are on screen here rather than in a footnote:

• Transpiration. Water moving from plants to the atmosphere. Many diagrams show an arrow off a tree with no mechanism. Pair this stage with the forest preset in Storm Lab and the contribution becomes measurable.
• Infiltration. Water entering the ground rather than running over it. This is the stage that makes the stormwater investigation work, because it is what changes when land cover changes.

For each stage the Selected Process card gives the description, the transfer (for evaporation: surface water → atmosphere), and a concrete fact — about 90% of evaporation comes from the oceans. That last kind of detail is what students use to argue with each other productively.

A note the tool makes explicitly, and so should you: water cycles; energy flows. The water returns to where it started; the energy does not. Also, the tool distinguishes its qualitative "physical time" from playback speed — the animation running faster does not mean the physical process is faster.

5. Three classroom walkthroughs

A. The system, not the diagram (grades 3–5, one period)

1. Grade band 3–5. Explore mode, System Map view.
2. ▶ Start guide and step all six processes as a class, on the projector, using Focus Canvas.
3. At each stage, one student reads the cause aloud and another predicts the look for before you unpause.
4. Switch to Droplet Journey and run the same cycle following one parcel. Ask: "did the droplet visit every process?" (It does not have to — that is the point of a cycle with branches.)
5. Exit ticket: each student writes the cause → change → evidence sentence for one process, without looking.

B. The stormwater investigation (grades 6–8, one or two periods)

1. Press Start investigation on the opening prompt.
2. In Storm Lab, load the Balanced baseline preset and press ⊕ Set baseline. Everyone starts from the same state.
3. Students predict, in writing, what will change if the ground becomes urban.
4. Load Urban runoff. Change only that. Compare against the baseline.
5. Then Forest and permeable ground, same comparison.
6. Write-up: which process changed most, and why that produces more water in the street. Infiltration is the answer; the reasoning is the grade.

C. Latent heat, for real (grades 9–12)

1. Grade band 9–12, Explore mode.
2. Read the energy line for all six processes and tabulate: absorbed or released?
3. Ask the question that lands: "if condensation releases heat, where does that energy go, and what does it power?" (Storms. This is the engine of a hurricane.)
4. Move to Storm Lab, raise Temperature and Solar intensity one at a time, and connect the rainfall response back to the energy budget.
5. Extension: Water Worlds — change the valley’s ground cover, run the same storm again, and account for where the rain went.

6. Storm Lab: one variable at a time

Storm Lab is the tool's experiment surface, and its design supports honest investigation: five named sliders plus six presets, with the presets acting as pre-built comparisons rather than shortcuts past the thinking.

The six presets are Custom controls, Balanced baseline, Heatwave and dry ground, Heavy storm, Forest and permeable ground and Urban runoff.

Teach with the presets as a controlled comparison. Baseline first, ⊕ Set baseline, then one preset. The difference between two presets is a legitimate experiment because everything else is held. "Heatwave and dry ground" versus "Heavy storm" is the pairing that surprises students: dry ground can produce more runoff, because baked soil does not absorb.

7. Three misconceptions this tool can fix

"The water cycle is a circle that goes in one order."

Droplet Journey shows a parcel that can skip stages, sit in the ground, or return to the ocean without ever falling on land. Run it twice and it does not repeat.

"Rain happens because clouds get heavy."

The condensation card names the mechanism — vapour reaching a temperature where it cannot stay a gas, releasing latent heat. Set the temperature slider low and watch where condensation begins.

"Water disappears when it evaporates."

The transfer line is explicit: liquid water → water vapor, surface water to atmosphere. Nothing is destroyed, and the mass is still in the system. Pair with the tool's own statement that water cycles while energy flows.

8. Accessibility and motion

• The model can be paused from the keyboard. The tool states it on screen: press Space or Enter on the model to pause. A student who finds continuous animation hard can read every stage stopped.
• Nothing depends on watching. Each process carries a written cause, transfer, energy note and "look for" line, so the science is available as text.
• Focus Canvas removes surrounding interface — useful for projection and for students who are distracted by a busy screen.
• Grade bands are the built-in reading-level support; see section 2.
• Energy cues are labelled in the legend (transfer path, energy cue, tracked parcel) rather than communicated by colour alone.

9. When something looks wrong

Students say the animation is "too fast to see."

Pause it (Space on the model) and step the stages with the guide instead. Playback speed is not physical speed — the tool separates the two deliberately, and saying so out loud prevents a real misconception.

Two students get different Storm Lab results from the "same" settings.

Check the antecedent soil saturation slider. It is the control students forget they moved, and it changes the outcome more than they expect.

The investigation prompt disappeared.

It is the guided investigation on the Explore screen; switching modes moves you past it. Return to 🌊 Explore.

A droplet run did not include transpiration.

Correct and realistic. One parcel does not take every path. Run it again, or use System Map when you need all six processes visible at once.

More

About Water Cycle · All manuals and guides · Other Earth & Space Science tools