Burning candles

Burning candles

Pencil and paperOnline interactive
Overview
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Connecting to the Curriculum
Marking Student Responses
Further Resources
This task is about using your science knowledge to make a prediction about burning.
Three candles, all exactly the same, are lit at the same time and put in 3 different containers. There is no wind in the room.

Question Change answer

In which order will the candles most likely go out?
Put them in order from least likely to most likely.
 
  • candle-large-closed-box.png
  • candle-small-open-box.png
  • candle-small-closed-box.png

Question 1Change answer

b)  Explain why the answer you chose is correct.
Task administration: 
This task can be completed with pencil and paper or online.
Levels:
3, 4
Curriculum info: 
Keywords: 
Description of task: 
Students identify in which order candles will go out and explain their answer. Assessment focus: the role of oxygen in combustion.
Curriculum Links: 
Answers/responses: 
   Y7 (03/1997) Y8 (03/1997)
a)
Candle in a small open box; Candle in a large closed box; Candle in a small closed box
correct answer: Candle in a small open box; Candle in a large closed box; Candle in a small closed box
easy easy
b)
Candle in a small closed box has the least amount of oxygen/air available so it goes out first.
Candle in an open box has no limits on oxygen/air available so it burns the longest.
moderate easy