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Title__: Controlling Our Rate of Consumption

1. Two chocolate cookies per pupil

2. Graph paper

3. Clock with second hand

2. Create the graph indicating how many pupils finished eating every 15 seconds.

**Students Finished**

Eating Cookies

25 | |||||||||

20 | |||||||||

15 | |||||||||

10 | |||||||||

5 | |||||||||

0 | 15 | 30 | 45 | 60 | 75 | 90 | 105 | 135 | 150 |

Seconds

3. One cookie equals one coal deposit. Analyze the graph with the pupils. How many different coal deposits were consumed after 15 seconds? After 30 seconds? After 45 seconds? etc.

4. Distribute the second cookie. This time the pupils can only take a bite when you say "take a bite." Do this every 15 seconds. The system is the same: the pupils raise their hands when finished and you tally the number every 15 seconds.

5. Construct a second graph. The graph usually indicates that coal resources last longer. Analyze the data. How long did it take for all resources to be eliminated?

Question:

Compare graph #1 (unlimited consumption) with graph #2 (limited consumption). How do they differ? How are they the same? Can we help control how rapidly we use our resources, such as coal, oil and natural gas? How?

Provided by American Coal Foundation

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