: Ipu Mäwhene — Muffin Drop
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Approach:   One to one  
64Kb
Focus: Gravity and air resistance 
Resources: 2 small muffin cases, 4 large muffin cases, orange and green A4 sheets of paper
He whakatau kupu: whakatepou = vertical, whakatepae = horizontal, köpenupenua = crush,
hopuoro = microphone, papatahi = flat; ipu mäwhene = muffin case

Questions/instructions:

Ka whakaotia te mahi tuatahi ki te tëpu.
Ko tënei mahi, he äta whakaaro ki te ähua o te taka mai o tëtahi mea. Ka whakamahia ëtahi pepa e rua.
Hoatu te pepa karaka me te pepa käkäriki (A4 te rahi) ki te äkonga.
Puritia whakatepou te pepa karaka, kia pënei
(mäu e whakaatu).
Puritia whakatepae te pepa käkäriki (mäu e whakaatu). Tukuna ngä pepa e rua i te wä kotahi, mai i te teiteitanga örite.
Kia rite ki te teitei o te mahunga o te äkonga te wähi tuku ai i ngä pepa e rua.
 This first activity is done at the table.
In this activity you’ll be thinking about how things fall through the air. We’re going to use two sheets of paper.
Give student sheet of orange and green A4 paper.
Hold the orange one vertically, like this [demonstrate]. Hold the green one horizontally, like this [demonstrate]. Drop them from the same height at the same time.
Drop from height of student’s head.

% responses
1. Ko tëhea te pepa i tau tuatahi ki te papa – te mea käkäriki, te mea karaka ränei?

Which one hit the table first — the orange one or the green one?
orange

98
2. He aha tënä pepa i tau tuatahi ai ki te papa?

Why do you think that one hit the table first?
less air resistance

21
Inäianei, ka whakamätauria he ipu mäwhene.
Hoatu ngä ipu mäwhene ki te äkonga.
Me whakaoti tënei mahi ki mua i te aroaro o te kämera.
Äwhinatia te äkonga ki te kimi i tëtahi wähi wätea hei tuku i ngä ipu. Me tü
ia ki mua i te kämera. Waihotia te hopuoro ki te wähi e tika ana.
Tangohia tëtahi ipu mäwhene iti me tëtahi ipu mäwhene nui. Puritia ngä ipu ki te teiteitanga örite. Tukuna i te wä kotahi.
Kia 3 ngä mahinga pënei.
Waiho te äkonga kia mahi i täna mahi.
 Now we’re going to use paper muffin cases.
Give student paper muffin cases.
You need to stand in front of the camera to do this experiment.
Assist student to find a clear space to stand and drop objects.
Take a small paper case and a large paper case. Hold the paper cases upright at the same height. Then let them go at the same time. Do this 3 times.
Allow time.

3. Ko tëhea te mea i tau tuatahi ki te papa?

Which one hit the floor first — the small case or the large case?
small case

58
4. Ki töu whakaaro, he aha tënä ipu i tau tuatahi ai ki te papa?

Why do you think that one hit the floor first?
less air resistance

10
because it’s smaller

24
Tangohia kia rua ngä ipu nui. Mahia tëtahi kia papatahi. Puritia ngä ipu e rua ki te teiteitanga örite, ka tuku ai i te wä kotahi. Kia 3 ngä mahinga pënei.
Ki te hiahiatia, mäu e äwhina te äkonga ki te takapapa i tëtahi o ngä ipu.
Now take two large paper cases. Flatten one out. Hold both paper cases at the same height. Let them go at the same time. Do this 3 times.
If necessary assist student to flatten the cup.

5. Ko tëhea te ipu i tau tuatahi ki te papa – te mea papatahi, te mea pökai ränei?

Which one hit the floor first — the flat one or the other one?
normal one (not flattened)

100
6. Ki töu whakaaro, he aha tënä ipu i tau tuatahi ai ki te papa?

Why do you think that one hit the floor first?
less air resistance

20
Tangohia tëtahi ipu nui, me tëtahi ipu iti. Köpenupenua ngä ipu e rua. Puritiaki te teiteitanga örite, ka tuku ai i te wä kotahi. Kia 3 ngä mahinga pënei.   Take a small paper case and a large paper case. Screw them both up into tight balls. Hold them at the same height and let them go at the same time. Do this 3 times.
 

7. Ko tëhea te ipu i tau tuatahi ki te papa – te mea iti, te mea nui ränei?

Which hits the ground first — the small one or the large one?
same time

15
8. Ki töu whakaaro, he aha tënä ipu i tau tuatahi ai ki te papa?

Why did that one hit the floor first?
not marked

•
9. He aha te take i tonoa kia toru ö mahinga i ënei whakamätau?

Why do you think that you were asked to do each of these activities three times before I asked you what happened?
to check consistency, reliability [replication]

26

Total score:


5–6

11
3–4

34
2

19
0–1

36
Commentary:
With exception of the last experiment, a majority of the students accurately observed what happened. Less than a quarter could explain the effects of air resistance.
 
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