Lesson sequence overview

Topic: The water cycle – evaporation, condensation, precipitation

Audience: Grade 4 students (ages 9-10)

Duration: 45 minutes | Class size: 24 learners | Format: In-person | Assessment: Labelled diagram with written explanation

Learning goal: Learners will be able to explain how water moves through the environment in a continuous cycle, naming and describing each stage in sequence.

Natural progression: Learners must first connect to water they can see and touch before moving to invisible processes. Evaporation is taught first because it is observable in daily life. Condensation follows as its visible counterpart. Precipitation connects both to a familiar experience. The cycle relationship is introduced last, after each stage is understood individually.

Stage-by-stage breakdown

Stage 1 – Introduction (0:00 – 0:07)

Purpose: Activate prior knowledge and create curiosity about a familiar phenomenon.

Facilitator places a cold glass of water on the desk at the front. Asks: “Where did the water on the outside of the glass come from? I didn’t pour it there.” Learners discuss in pairs for 90 seconds, then share ideas aloud. No answer given yet. Facilitator records guesses on the board without comment.

Stage 2 – Concept development: evaporation (0:07 – 0:15)

Purpose: Introduce the first stage of the cycle using a concrete, observable example.

Facilitator wipes a wet sponge across the whiteboard and asks learners to watch what happens over the next few minutes. While waiting, explains evaporation: liquid water gains energy from the sun and turns into invisible water vapour that rises into the air. Returns to the board – the wet mark is gone. “Where did it go?” Learners answer using the new vocabulary.

Stage 3 – Concept development: condensation (0:15 – 0:22)

Purpose: Introduce the second stage by returning to the opening hook.

Facilitator returns to the cold glass. “Now – who can explain what happened here?” Learners apply the water vapour concept: warm air near the cold glass loses energy and water vapour turns back into liquid. Condensation is named and defined. Facilitator connects it explicitly: “This is the opposite of what we just saw on the board.”

Stage 4 – Concept development: precipitation (0:22 – 0:28)

Purpose: Extend the sequence upward into clouds and rainfall.

Facilitator shows a simple visual: water vapour rising, forming clouds, falling as rain. Asks: “If condensation happens on a cold glass, what do you think is happening inside a cloud?” Learners reason aloud. Precipitation introduced as what happens when condensed water droplets become too heavy to stay in the air. Rain, snow, and hail named as forms.

Stage 5 – Guided practice (0:28 – 0:36)

Purpose: Learners sequence and label the cycle with support still available.

Each learner receives a diagram with four blank labels and arrows already drawn. They work individually to label each stage and write one sentence describing what happens at that point. After 5 minutes, pairs compare and discuss any differences. Facilitator circulates and checks for common errors before the next stage.

Stage 6 – Independent application (0:36 – 0:43)

Purpose: Learners apply understanding to an unfamiliar context without prompting.

Facilitator poses a new scenario: “It rained heavily yesterday. Using the water cycle, explain where that rain came from and where the water goes after it lands.” Learners write a short explanation (3-5 sentences) independently. No diagram provided – recall from memory.

Stage 7 – Consolidation (0:43 – 0:45)

Purpose: Close the loop and reconnect to the opening question.

Facilitator points back to the board where the original guesses were written. “Looking at these – which ones were close? Which ones would you change now?” One or two learners respond. Facilitator states the core idea in one sentence: “Water doesn’t disappear – it changes form and keeps moving.”

Transition plan

• Stage 1 ? 2: Unanswered question on the board creates the need to know – evaporation is introduced as the beginning of the answer
• Stage 2 ? 3: “We’ve explained the board – now let’s go back to the glass” reconnects to the hook and shows the reverse process
• Stage 3 ? 4: “If this happens on a small cold surface, what happens up in the sky where it’s much colder?” scales the concept upward
• Stage 4 ? 5: “You’ve heard all three stages – now let’s see if you can put them in order yourself” signals the shift from receiving to doing
• Stage 5 ? 6: Pairs comparison closes guided practice; facilitator signals: “Now try it without the diagram”
• Stage 6 ? 7: Written task is complete; facilitator brings attention back to the front with the original guesses still visible

Checkpoints

• After Stage 2 (0:15): Ask one learner to explain evaporation in their own words before moving to condensation – if the explanation is incomplete, rephrase using the whiteboard example before continuing
• After Stage 3 (0:22): Cold call: “So what is condensation – in one sentence?” Confirm the answer includes both the temperature change and the state change
• During Stage 5 (0:33): Circulate and check diagrams – specifically look for learners who have evaporation and condensation swapped, which is the most common error
• After Stage 5 (0:36): Do not move to independent application until at least 80% of learners have the diagram correctly labelled – address errors briefly with the whole group if needed

Facilitator notes

• The cold glass must be prepared before class – it needs to be visibly wet on the outside by the time Stage 3 arrives
• Do not answer the opening question in Stage 1 – the unresolved tension is what makes Stage 3 land
• The most common sequencing error learners make is placing precipitation before condensation – address this explicitly during the guided practice circulate
• If Stage 4 runs long, compress Stage 5 to individual labelling only – skip the pair comparison, not the independent writing in Stage 6
• The consolidation in Stage 7 is two minutes – do not expand it. The written task in Stage 6 is the real assessment; Stage 7 is closure only