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Drop Goes Plop: A First Look at the Water Cycle

An experiment to understand what evaporation is.

S Tassell

on 30 November 2012

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Transcript of Drop Goes Plop: A First Look at the Water Cycle

An experiment about evaporation and links to the water cycle- Lower KS2 Links to The Drop Goes Plop by Sam Goodwin National Curriculum This experiment is aimed at lower KS2 pupils. It is to be completed over 2 days. (1hr and 30 mins in total)

It aims to fulfil the following objectives of the National Curriculum:
SC3- Materials and their properties
2- Changing materials
d – Pupils should be taught about reversible changes including dissolving, melting, boiling, condensing, freezing and evaporating.
e – Pupils should be taught about the part played by evaporation and condensation in the water cycle. Lesson Objective:
To understand what evaporation is. Essential skills used:

To make predictions about what might happen.

To work as a member of a team and take part in group discussions. Using speaking and listening skills

To use equipment safely and appropriately. The Experiment 1) Elicitation and Questioning: Water going into the air
is called ‘Evaporation’
What happens
to water
Where do the dew drops
on the leaves go by the
end of the day?
Where does the water
go when you put your
clothes on the line
to dry?
Where does the water
go after a large
fall of rain?
Class activity Get two dishes. Put about 10 ml (two teaspoons) of water in each dish.

Place one dish in the sunlight, or if the sun isn't shining, place the dish under and close to a light source.

Place the other dish in the shade.

Leave the dishes overnight and record what happens to the water.

Ask the children to explore the best way of recording by table group. Class Activity 2 Prepare another two dishes, at the same time, and repeat the experiment but this time cover both dishes. Day 2- The Results Children are to take it in turns by group to look at the dishes left out.

Talking pairs- Pupils to answer these questions with a partner:Which dish evaporated faster? Where did the water go? How did the water evaporate?

Ask the children to group together on the carpet. Discuss what happens to water after it evaporates.

Was there any difference between covered and uncovered dishes? Ask for ideas and write some other examples of evaporation on board. Activity:

Ask the children to record their observations on the evaporation work sheet that asks them what they noticed and asks them why it happened

Discuss the dishes that were covered as a class and the children are then to share ideas first with a partner and then with the class. Check for errors and misconceptions. Recording the results To conclude: The children will have recorded their results on their worksheet and talked about evaporation and how it works. At the end read the book: The Drop Goes Plop by Sam Goodwin which will prepare them for their next step- to learn about the water cycle and look into condensation.

By Stephanie Tassell
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