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Jess Science Term 3
Transcript of Jess Science Term 3
Our Fair Test
Steps 1, 2 and 3
AIM: Observe how quickly the oxidation of copper coins varies if we use the Sun, Vinegar and Coke?
Steps 4 and 5
The liquid variables: Coke, Vinegar and the Sun (Gas)
The time that it takes for the coin to oxidise and the amount of liquid used in each cup
Keeping the same:
The type of coin, the ml's of liquid and the position
We will need:
100mls of Diet Coke
100mls of Brown Vinegar
plastic cups (2 extra)
1 Pyrex measuring jug
5 copper coins (2 extra)
A small dessert spoon
1: Take 3 of the plastic cups and take 3 of the coins and place 1 in each cup.
2: Pour 100mls of diet coke into one cup and pour 100mls of brown vinegar into another LEAVE ONE CUP EMPTY (Be sure to label all cups)
3: Place each cup side by side in a place where there is sunlight, start a new stopwatch for each cup and stop time when coin is fully oxidised.
4: Record final time and any observations in a graph or write up.
5: Conclude the experiment using the results.
At the completion of our experiment, the final times were:
Sun: 3hrs and 2mins
Vinegar: 3hrs and 3mins
Coke: 3hrs and 4mins
1: Is this change chemical or physical and why?
2: Describe the action that caused change
3: Reflect on the investigation process. Suggest 2 or 3 areas you could change to improve the procedure or results.
(All have been answered in Science Booklet)