Page 51 - Laboratory Manual in Physical Geology

A CTIVIT Y 1.6 Isostasy and Earth’s Global Topography

Name: ______________________________________ Course/Section: ______________________ Date: ___________

A. As exactly as you can , weigh (grams) and determine the volume (by water displacement, FIGURE 1.9 ) of a sample of basalt.

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Add your data to the basalt density chart below. Calculate the density of your sample of basalt to tenths of a g>cm . Then
determine the average density of basalt using all ten lines of sample data in the basalt density chart.
B. As exactly as you can , weigh (grams) and determine the volume (by water displacement, FIGURE 1.9 ) of a sample of granite.

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Add your data to the granite density chart below. Calculate the density of your sample of granite to tenths of a g>cm . Then

determine the average density of granite using all ten lines of sample data in the granite density chart.
A. BASALT DENSITY CHART
Basalt
3
3
Sample Sample Weight (g) Sample Volume (cm ) Sample Density (g/cm )
Number
1 40.5 13 3.1
2 29.5 10 3.0
3 46.6 15 3.0
4 31.5 10 3.2
5 37.6 12 3.1
6 34.3 11 3.1
7 78.3 25 3.1
8 28.2 9 3.1
9 55.6 18 3.1
10

Average density of basalt =
B. GRANITE DENSITY CHART
Granite
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3
Sample Sample Weight (g) Sample Volume (cm ) Sample Density (g/cm )
Number
1 32.1 12 2.7
2 27.8 10 2.8
3 27.6 10 2.8
4 31.1 11 2.8
5 58.6 20 2.9
6 62.1 22 2.8
7 28.8 10 2.9
8 82.8 30 2.8
9 52.2 20 2.6
10

Average density of granite =

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