1: Why can changes in volume be used to estimate changes in density?2: Where might errors creep into your observations?3: Why don’t all liquids display a temperature versus density relationship similar to that of water? 4: If a single molecule does not have a temperature, what does temperature measure?5: Why is ice less dense than water?6: What would happen to our apparatus if the water in it froze?Understanding Diffusion1: Is the relationship between time and average distance traveled linear?2: Is the relationship between time to travel a set distance and temperature linear?3: Would changing the distance travelled change your answer?4: In your experiments why did you not get exactly the same value for each measurement? What was the source of the variation? 5: Does the presence of variation mean that the system cannot be described mathematically? 6: How would decreasing the number of diffusing particular from 30 (as it is) to 5 alter your measurements? 7: How would increasing the number of diffusing particle from 30 to 1000 alter your measurements? 8. Einstein hypothesized that invisible particles were responsible for Brownian motion – was this scientific, postulating invisible particles?