Questions / instructions:
In this activity you are going to find out and tell me about how quickly different materials let heat through them.

Show student the rods as you name them.

1. Here are 5 rods.They are made of wood, perspex, copper, steel and aluminium. I am going to put them into this cup then pour in boiling water. Then I will get you to touch the end of each rod to find out how much heat they are letting through.

2. But before we start, can you tell me which rod you think will let the heat move through most quickly?

I tënei mahi ka whakamätau koe i te tere o te kawe wera a ëtahi rauemi, ä, ka whakamärama mai ai ki a au.

Whakaaturia ngä matire ki te äkonga i a koe e whakaingoa haere ana.

1. Anei ëtahi matire e rima: kua hangaia ki te räkau, te kiriaku puata [perspex], te konukura [copper], te tïra[steel], me te konumohe [aluminium].
E kuhua ana e au ki roto i te maka, ka riringi ki te wai wera. Mäu e whäwhä ngä töpito o ia matire kia mätau ai pëhea te nui o te wera kei te kawea.

2. Engari, i mua i te tïmatatanga, ka taea e koe te kï mai ko tëhea te matire tino tere ki te kawe i te wera?

4. Now let's do the experiment.

I am going to pour boiling water into the mug, and I want you to test each rod.

When you test the rods, touch them like this:

Demonstrate how the rods should be touched — before  the boiling water is added. Demonstrate use of timer.

I will get you to check them every 30 seconds, for two minutes.

With the rods already in the mug, pour boiling water into the mug, and get ready to time the 30 sec intervals.

Repeat the following instruction 4 times (every 30 seconds).

5. Feel each rod now, and tell me what you notice.

After 2 minutes of feel tests:

4. Me whakamtautau inäianei.

E ringihia ana e au he wai wera ki roto i te maka, ä, mäu e ärohi ia matire.

Ka ärohi koe i ngä matire, me pënei te pä.

I mua i te ringihanga ki te wai wera, whakaaturia me pëhea te pä atu ki ngä matire. Whakaaturia te whakamahinga o te mata wäti.

Mö te 2 meneti, me ärohi e koe ia 30 hëkena.

Kua kuhua nei ngä matire ki roto i te maka, ringihia ki te wai wera, ka whakarite ai i ngä wä e toru tekau hëkena.

Hokia anö ngä tohutohu e whai ake nei mö ngä wä e 4 (ia 30 hëkena).

5. Whäwhätia ia matire inäianei, ä, ka kï mai he aha täu i rongo ai.

Ka taha te 2 meneti o ngä ärohi whäwhä:

6. Now lift each rod out of the water and place them on the table in order, from the one that let the heat through most quickly, to the one that let it through least quickly. Be careful to lift them out with a paper towel so that you don't burn your fingers.

7. Materials that let the heat travel through easily are called good conductors.
Which rods were good conductors of heat?

7. Ko ngä rauemi hanga noa te kawe wera ka karangatia he kawenga pai.
Ko ëhea ngä matire kawenga pai?

8. When toffee is made, the ingredients are made very hot, a lot hotter than water. If we had spoons made out of each of these materials, which spoon would be the best for stirring the very hot toffee mixture?

9. Why would you use that material?

Show student the picture of a saucepan.

The saucepan in this picture is made of stainless steel.It has a copper bottom, and a plastic handle.

10. Why do you think it has a copper bottom?

Whakaaturia te pikitia o te köhua ki te äkonga.

He köhua tïra kore waikura tënei i roto i te pikitia nei. He kapa a raro, he kirihou te kakau.

10.Ki öu whakaaro: he aha i kapa ai a raro

11. Why do you think it has a plastic handle?