Earth Science · B5 Science

Lesson notes

Learning Objectives

Indicator: B5.2.1.3.1 - Demonstrate evaporation and condensation as important processes of the hydrological (water) cycle

By the end of the lesson, learners can:

Define evaporation as the process by which liquid water changes into water vapour (gas) when heated.
Define condensation as the process by which water vapour changes back into liquid water when cooled.
Demonstrate evaporation and condensation using simple classroom materials, such as wet hands and a covered container of water.
Explain, in their own words, how evaporation and condensation work together to help form rain.
Identify examples of evaporation and condensation in their everyday surroundings, such as puddles drying up and droplets on a cold bottle.

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Curriculum details

Strand: Cycles (Strand 2)
Sub-strand: Earth Science (2.1)
Content standard: B5.2.1.3 - Show understanding of the roles of condensation, evaporation, transpiration and precipitation in the hydrological (water) cycle
Indicator: B5.2.1.3.1 - Demonstrate evaporation and condensation as important processes of the hydrological (water) cycle
Suggested placement: Term 1, Week 9 (Week 9 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Science Curriculum (Basic 4-6), 2019, p. 20
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

- Learners recite poems and rhymes involving the environment and water.
- In groups, learners demonstrate evaporation and condensation, e.g. learners observe water drying off their wet hands (evaporation), covering water with a lid and observing water droplets on the lid after some time (evaporation & condensation).
- Demonstrate evaporation by heating water until it boils (to be done by the teacher), then covering the boiling water with a sheet of transparent glass. Water vapour condenses on transparent glass (condensation).
- Learners are assisted to understand how evaporation and condensation lead to the formation of rain.
- Display pictures or simple diagrams of the water cycle showing evaporation and condensation.