Data Sheet

Draw a picture of the shape cooking ball found in your earth oven. Write the name of this type below. You may record your observations during the experiment in the last column.

Type _____________

 Time Oven Temperature Observations during Experiment 1 minute = _ _ 2 min. = _ _ 3 min. = _ _ 4 min. = _ _ 5 min. = _ _ 6 min. = _ _ 7 min. = _ _ 8 min. = _ _ 9 min. = _ _ 10 min. = _ 11 min. = _ _ 12 min. = _ _ 13 min. = _ _ 14 min. = _ _ 15 min. = _ 16 min. = _ _ 17 min. = _ _ 18 min. = _ _ 19 min. = _ _ 20 min. = _ _ 21 min. = _ _ 22 min. = _ _ 23 min. = _ _ 24 min. = _ _ 25 min. = _ _ 26 min. = _ _ 27 min. = _ _ 28 min. = _ _ 29 min. = _ _ 30 min. = _ _

Line Graph:

Create a line graph to show your data. You will need to plot the data by making little dots with a colored pencil which show the temperatures and times. The temperatures should be written along the left vertical axis of the graph. The times you recorded data are written along the bottom horizontal axis of the graph as the number of minutes. When you finish, use a ruler to connect the dots. Showing your data in this way may help you see some interesting results. Work with other students in your class to create a class graph showing the results for all the earth ovens. Then answer the results and conclusions questions below.

Results:

Which oven reached the highest temperature?______________________

Which oven kept its heat the longest? _______________________

Conclusions:

If you wanted to cook something quickly, what shape balls would you put in the earth oven?

_____________________________

If you wanted to get a high temperature in your oven and keep it hot for a long time, what kinds of cooking balls would you put in your oven?

____________________________________________________________

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What is the effect of adding earth on top of the cooking balls and the food? What do you think would happen if you didn't cover the balls with dirt?

_____________________________________________________________________________

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Is there any connection between the amount of surface area that a cooking ball has and the way that it gives off heat in the earth oven? If so, what is it?

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