8. Candle Burning Times

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# 8. Candle Burning Times - PowerPoint PPT Presentation

8. Candle Burning Times. Scientific Enquiry Question. The diagram shows a candle burning in air under a bell-jar. The class were shown this demonstration, then they had to plan their own experiment.

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### 8. Candle Burning Times

Scientific Enquiry Question

The diagram shows a candle burning in air under a bell-jar.

The class were shown this demonstration, then they had to plan their own experiment.

They had to find out if there was a relationship between volume of container and burning time.

The pupils set up a similar

different sizes of beaker. They

lit the candle, carefully put the

beaker over the top of it and

timed how long it took for the

flame to go out. This was

repeated 3 times for each

beaker.

(b) The results from one group of pupils are given below.

(i) Calculate their average burning times. Put the answers in the table

(ii) In this experiment each part of the experiment was repeated 3 times. Why is it often a good idea to repeat the readings?

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(c) Plot a graph to show group’s results.

The graph must have title that makes it clear what has been done.

The axes must be labeled to show the dependent and independent variables.

Any suspect or odd points must be made clear. (if there are any)

A best-fit line should be drawn.

Attach your graph paper to this sheet

Graph to show how the beaker volume

affects the average burning time of a candle

X

X

Average burning time (s)

0 2 4 6 8 10 12 14 16 18 20

X

X

0 100 200 300 400 500 600

Beaker volume (ml)

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