Science · Year 5

Active learning ideas

Evaporation and Condensation

Active learning works for evaporation and condensation because these processes are invisible to the naked eye and require students to observe, measure, and manipulate variables. Hands-on tasks let students see gradual changes over time, which builds patience and precision in measurement.

• National Curriculum Attainment Targets
• NC-KS2-Science-Y5-PCM-3

• 20–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Simulation Game
• 45 min · Small Groups

Investigation Stations: Evaporation Rates

Prepare stations with identical water volumes in dishes under different conditions: sunlight, shade, fan, and covered. Students measure and record water levels every 10 minutes, then graph results and discuss factors affecting speed. Conclude by predicting fastest evaporation.

Explain how evaporation is different from boiling.

Facilitation Tip

During Investigation Stations: Evaporation Rates, remind students to dry dishes with paper towels before weighing to avoid skewing initial mass measurements.

What to look for

Provide students with two scenarios: 1) A puddle drying up on a sunny day. 2) Water droplets forming on the outside of a cold juice bottle. Ask students to write one sentence for each scenario explaining whether evaporation or condensation is occurring and why.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Activity 02

• Simulation Game
• 20 min · Pairs

Demo Pair: Condensation Jar

Pairs fill clear jars with hot water, cover with plastic wrap and ice cubes. They observe droplets forming on the wrap, wipe and time re-formation, then explain using particle theory. Extend by testing cold mirror with breath.

Compare the processes of evaporation and condensation.

Facilitation Tip

In Demo Pair: Condensation Jar, instruct students to warm the jar with their hands before adding ice to speed up condensation and make it visible.

What to look for

During a lesson segment on factors affecting evaporation, ask students to hold up fingers to indicate the relative effect of increasing surface area (1=little effect, 5=large effect). Then, ask them to do the same for increasing airflow. Discuss their responses.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Activity 03

• Simulation Game
• 30 min · Pairs

Prediction Walk: Classroom Hunt

Students walk the room or school, noting spots where condensation forms like windows or pipes. In pairs, they predict causes, justify with temperature differences, and share findings in whole class vote on best examples.

Predict where condensation might form in everyday situations and justify why.

Facilitation Tip

For Prediction Walk: Classroom Hunt, set a clear time limit of five minutes so students focus on identifying surfaces with visible moisture rather than exploring unrelated areas.

What to look for

Pose the question: 'Imagine you are designing a system to dry clothes quickly. What two factors related to evaporation would you try to maximize, and why?' Facilitate a class discussion where students justify their choices based on scientific principles.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Activity 04

• Simulation Game
• 25 min · Whole Class

Whole Class: Evap vs Boil Timeline

Project images of evaporating puddle and boiling kettle. Class brainstorms timelines of particle movement, then acts out in role-play: slow drift for evaporation, rapid bubble for boiling. Vote on key differences.

Explain how evaporation is different from boiling.

Facilitation Tip

Use Whole Class: Evap vs Boil Timeline to clarify that boiling is a rapid form of evaporation by having students plot both processes on the same time scale.

What to look for

Provide students with two scenarios: 1) A puddle drying up on a sunny day. 2) Water droplets forming on the outside of a cold juice bottle. Ask students to write one sentence for each scenario explaining whether evaporation or condensation is occurring and why.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

A few notes on teaching this unit

Teach evaporation and condensation as observable, measurable processes rather than abstract concepts. Use timers and scales to quantify change, which helps students see that evaporation occurs continuously and slowly. Avoid rushing to the water cycle until students can explain the mechanisms behind individual changes of state.

Success looks like students describing evaporation as a surface process that happens below boiling, linking condensation to cooling below dew point, and explaining how both processes cycle water in the environment. Students should use evidence from their investigations to support these explanations.

---

Watch Out for These Misconceptions

• During Investigation Stations: Evaporation Rates, watch for students who assume evaporation only happens at high temperatures.

  Use a triple-beam balance to measure water loss in dishes left at room temperature over 30 minutes, then compare results to a dish heated gently with a lamp to show evaporation occurs without boiling.

• During Demo Pair: Condensation Jar, watch for students who think condensation requires freezing temperatures.

  Have students warm the jar with their hands before adding ice to demonstrate condensation forms quickly at temperatures well above freezing.

• During Whole Class: Evap vs Boil Timeline, watch for students who conflate evaporation with boiling.

  Use timers to record mass loss in a beaker of water at room temperature and a boiling beaker simultaneously, then plot both lines on the same graph to highlight the difference in speed and energy.

---

Methods used in this brief

• Simulation Game