calculate the speed of the sound through the material
plot a bar chart of your results
answer the questions
Bring in:
-the sheet with calculations
-your graph
-your answers to the questions (either completed on the sheet or on the back of the graph)
Due Thursday 21st Feb P3
Questions
1 The variable you changed (independent) was the material. What was the dependent variable that also changed? State whether it was categoric or continuous.
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2 Data loggers were used to obtain the times. Why was it not appropriate to use stopwatches?
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3 The tests were not repeated. Why is this not good in science practicals?
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4 The resolution of a measuring device is the smallest measurable change in the quantity being measured. What was the resolution of the sound sensors and data logger?
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5 One of your tasks is to draw a bar chart of the results. Why is this better than drawing a line graph for these results?
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6 Looking at your bar chart, can you write a conclusion about the speed of sound in different materials? Remember sound needs to travel through particles.
Try to compare the speed of sound with closeness of particles. Use words like closer than; faster than; more spaced out.
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