T1+Science-++Melting+Wax

Monday 29th March

Aim: What metal conducts heat the fastest:- Steel,aluminium, copper or brass?

hypothesis: I think that aluminium will be the fastest conductor of heat because it is a good quality metal and it is used for cooking.

I think that brass will be the slowest because it is not that high quality.

Method: Materials:

1x tripod 1x spirit burner 4x small was buttons [same size]x 1x Round wooden ring with 4 pieces of metal the same size and shape fixed equidistant to each other so that the point faced inwards and the indent was on the outside [see Figure 1]. The metals were steel [S], aluminium [A], copper [C] and brass [B]. 1x stop watch

Method: Procedure: 1. We put small pieces of wax int he hollows on the ends of 4 strips of different metals that were fixed on a round wooden frame. 2. We heated the metal strips. 3. We timed the melting of the table. 4.We recorded the times in a table. Results



Our group found that the wax melted in the following :1st Aluminium 2nd Brass 3rd Copper last Steel



Conclusion: My hypothesis was wrong and right because I had said that aluminium would conduct the heat the fastest and I thought that that brass would conduct the heat the slowest but steel was the slowest to conduct the heat.

The wax melted the fastest with the aluminium because the molecules are easier to move than in the other metals and this is what makes the heat travel though the metal. This is called “heat conduction”. Where the molecules are more difficult to move,heat takes move time to move though it.

Conduction occurs when the molecules bump against each other and cause more movement. It is like pushing someone who trips and pushes another person in a crowd and the movement ripples outwards.

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We use copper metal in pots and pans because we want to heat food we use steel in pipes and hot water cylinders so that heat doesn’t burn our fingers. Brass is used in tapes because brass rust. Aluminum is used in pots because that is how we cook our food. All of metals do get hot after a while such is terne.=====