: Te Wä Uwhiuwhi — Shower Time
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Approach:  One to one  
328Kb
Focus: Condensation 
Resources: Video recording on laptop computer
He whakatau kupu: mamao = steam

Questions/instructions:

He mahi rorohiko tënei.

Ka mätakitaki täua i tëtahi whiti ataata e whakaari ana i te raruraru a tëtahi. I muri i te horoi ki rö uwhiuwhi, ka kore e kitea ana te whakaata. Kia mätakitaki täua.

Päwhiria te pätene Te Wä Uwhiuwhi, ka tïmata te whiti ataata.
   This activity uses the computer.

We are going to watch a movie that shows somebody’s problem. After they have had a shower they can’t see in the mirror clearly. Let’s watch the movie.

Click the Shower Time button. The video will start.


[No soundtrack; sound of shower only]


% responses
I te wä o te uwhiuwhi, ka mamao katoa te whakaata.

During the shower the mirror steamed up.

1. He aha i mamao ai te whakaata i te wä uwhiuwhi?

Why did the mirror steam up during the shower?

[Shower puts water vapour into the air. This travels through room to mirror. Condenses on mirror when it hits cooler surface.]
full explanation
– all 3 elements

0
partial explanation
– 2 elements

16
vague explanation

39
2. I muri i tëtahi wä, ka ngaro haere te mamao, ahakoa käore e mukua (horoia, ukuia) kia maroke te whakaata. Ka ahatia te wai i te whakaata i te wä e ngaro haere ana te mamao?

He äwhina: Ka ngaro atu te wai ki hea?

If the mirror was not wiped dry, it would clear by itself. What would happen to the water on the mirror?

Prompt: Where would the water go?
water evaporates
back into air

20
3. Akene pea kua përä anö te whakaata i töu whare i a koe e uwhiuwhi ana. Arä, ka mamao te whakaata. He aha tëtahi mahi kia kore ai e mamao te whakaata?

You’ve probably had the same thing happen to you. You have a shower or bath and then find the mirror all steamed up. What could you do to stop the mirror steaming up?
not marked

•
4. He aha tënä mahi e whakakore atu ai i te mamao?

Why would that work?

Reduce moisture in air – dehumidifier; open a door or window; extractor fan:
at least one of these ideas, well explained

28
one idea without explanation

11
Heating air so it will hold more moisture – heater, heat lamp:
at least one of these ideas, well explained

2
one idea without explanation

4
Preventing moisture reaching mirrorsurface – barrier such as a towel on mirror:
at least one of these ideas, well explained

11
one idea without explanation

0
Chemical solution to prevent watercondensing on mirror:
mentioned and explained

0
mentioned without explanation

4
Reducing moisture in air by having colder shower:
mentioned and explained

4
mentioned without explanation

5
 

Total score:
6–13

0
4–5

18
2–3

43
0–1

39
Commentary:
Most students showed very limited understanding of evaporation and condensation of water.
 
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