Teaching Evaporation and Condensation in Years 4-5: A UK Guide

The water cycle fits Years 4 and 5 as a block of five to eight lessons covering the states of water, evaporation, condensation, and what happens to rain. This guide explains where the topic sits in KS2 science, how to pace it, and how to adapt a ready-made unit for a UK classroom.

Where it sits in the curriculum

In the National Curriculum in England, evaporation and condensation in the water cycle appear in the Year 4 programme of study on states of matter, where pupils also learn what causes evaporation to vary with temperature. The Water and the Water Cycle unit is written for Grades 3-4, which broadly matches Years 4 and 5, and its content sits closest to that area. This is a general description and not a claim of alignment.

The unit also touches on how water is used and protected, which you can link to geography or PSHE where it suits your school.

Many schools also teach the water cycle in geography, so check what pupils have already seen. If they have drawn a cycle diagram before, begin with the observation tasks and leave the diagram until the third lesson, so it comes from evidence instead of memory.

Pacing across a half term

The unit has five learning paths: discover water, evaporation, clouds and rain, where water goes, and use water wisely. Teach one path a week with a 35-minute slot: 5 minutes to open, 20 to explore, and 10 to consolidate. A sixth week can hold the project and the learning check.

If your science slot is an hour, you can combine the explore and a practical task in one session and keep the consolidation for the next day.

Practical work, language and writing

Keep a simple routine for practical lessons: predict, set up, record, explain. The damp cloth comparison and the cold glass both fit it. Because the unit asks pupils to separate what they see from what they infer, it also supports the working scientifically strand, which asks pupils to report findings and give reasons.

Practical work you can run

Path 2 asks pupils to plan a safe comparison using two identical damp cloths. The sample answer keeps the cloths and the amount of water the same, changes only the location, and records observations. That fits the enquiry skill of setting up a fair test.

Path 3 uses a cold glass. Droplets form on the outside, because moist air cools and some vapour condenses. Pupils can draw and label what they see, then write what they infer. The unit asks them to keep those two lists apart.

Adapting the spelling and terms

The student book uses American spelling, so you will see vapor and faucet where UK classes say vapour and tap. In the unit, the worked example about turning off the faucet while brushing teeth works well with a quick note. Water vapor is invisible in either spelling, and visible fog is made of tiny liquid droplets. Pupils who learn this precisely avoid a common muddle.

The explanation of precipitation and runoff needs no change. Many UK pupils will bring local examples, such as a stream near the school or a puddle on the playground, which you can use in the Observe and Transfer tasks.

Discussion and writing tasks

Every path ends with a transfer task. Pupils compare the worked example with a situation of their own and explain what is similar and what is different. For path 4 the worked example is rainwater flowing down a hill toward a stream. Ask pupils to describe a different place where rain goes, such as a pavement or a field, and what changes. This builds scientific vocabulary and reasoning in writing.

Project, support and extension

If you have a mixed-age class, the project can be the point where Year 5 pupils take a more demanding path, such as comparing two solutions to a water-saving problem, while Year 4 pupils explain one idea with two examples.

Project and assessment

In the project, pupils choose one path and make an explanation for another pupil with a heading, two examples and a question. The guide offers five criteria: accurate terms, examples explained well, a meaningful question, readable layout and useful image, and feedback applied. The learning check works as self-assessment and the teacher guide suggests using it for feedback rather than a grade.

Support and extension

Support comes from sentence starters, word cards and a shared image description, with options to read texts aloud or allow oral answers. For extension, pupils test a borderline case such as breath on a cold window, build a counterexample to a rule, or compare two solutions to a water-saving problem.

Related resources

For weather work next to the topic, the weather and climate worksheets for Grades 2-4 offer a lower-cost add-on.

If you teach science across several terms, the science bundle includes the water unit with three more.

The unit page lists the whole water book.

Related reading from the Teacher Hub

• Assessing the Water Cycle in Grades 3-4: Exit Tickets and Support
• Fog, Vapor and Raindrop Paths: Water Cycle Errors in Grades 3-4
• Light and Shadow Experiments for Grades 4–6: A Lesson Sequence