Diffusion is Hot!
Team Names __________________________ Period _____
Question:
How does temperature affect the rate of diffusion?
The one thing that we will change is (independent Variable) ____________________________
Things we need to keep the same for a “fair test” ____________________________________
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(scientists call these controlled variables or constants)
The outcome we will be measuring: (dependent variable) __________________________
Materials:
1. tap water, hot water, ice water
2. stopwatch or clock with second hand
3. food coloring
4. container for water
5. graduated cylinder
Procedure
Here’s how we will test it out…
1. __________________________________________________
2. __________________________________________________
3. __________________________________________________
4. __________________________________________________
5. __________________________________________________
6. __________________________________________________
Check with your teacher to make sure you are on the right
track before you do your experiment.
Diffusion is Hot - Backside
Data Table:
Room temp water
Hot water
Cold water
Second Group’s Data
Room temp water
Hot water
Cold water
Graph of Results:
Time to diffuse
notes:
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Conclusion:
Based on the data, we think
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Analysis:
1. Based on your data, and the data from another group, what happens to the rate of diffusion when the
water is hot? _______________________________________________________________________
2. Based on your data, and the data from another group, what happens to the rate of diffusion when heat
energy is removed? __________________________________________________________________
3. Based on your data, why does temperature affect diffusion rate? (state your answer in terms of
molecular motion) ____________________________________________________________________
4. Apply your knowledge: Would you smell a dead skunk faster on a hot summer day, or in the winter?
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