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http://i249.photobucket.com/albums/gg225/ab17z/hump/33.jpg. When Complete…. Stop and Think pg. 69 #1-6 Write out the Questions AND Answers in complete sentences. Work within your groups !!!. Stop and Think pg 69, #1-6.
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1. Compare the highlight comments you wrote beside each “what I see” entry with others in your team. Modify your comments based on what you learned from others. Include those modifications in your notebook
Constant positive slope
What I See: Constant Positive Slope
What it means: volume and mass are in a direct proportion for this liquid at room temperature and pressure
This graph shows how mass changes when volume increases for 3 different liquids. Notice how each liquid shows a steady increase in mass as its volume increases. Each data set closely follows a straight line. Since the slopes are different, the densities of each liquid are different. Even though the lines have different slopes for each liquid, the ratio between mass and volume for a given substance remains the same over all the measured values. This suggests that the relationship between mass and volume is constant for a given substance.
D=M/V
Remember to take the mass of only the liquid not the mass of the liquid AND graduated cylinder
You should see that your calculated sloes and average densities calculations for a given fluid are very close, within the expected variation in data due to instrument uncertainties
When the density and the slope are very close, it suggests that the slope and the density are the same. This is because Δy/Δx=y/x (calculation for slope)when it passes through the origin.
What is on the y axis?
What is on the x axis?
What is the formula for density?
If the densities are far apart, it suggests a procedural or calculation mistake
6. Decide as a team the best way to explain how graphs help you “see” density differences
Graphs help you “see” density because it is easy to see the steepness in slope. We cannot look at 2 clear liquids and tell by sight if the densities are the same. But with a graph, slope differences are very easy to see, especially for larger-sized samples.