review 1 astronomy 150, april 25 th 2005. phase diagrams phase diagrams – describe state of a...
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![Page 1: Review 1 Astronomy 150, April 25 th 2005. Phase diagrams Phase diagrams – describe state of a material How cold would you have to make this room so that](https://reader031.vdocument.in/reader031/viewer/2022032801/56649d555503460f94a336d8/html5/thumbnails/1.jpg)
Review 1
Astronomy 150, April 25th 2005
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Phase diagrams
• Phase diagrams – describe state of a material• How cold would you have to make this room so that CO2 would be solid?
– Decrease temperature below -78 degrees Celzius• How would you change the conditions of this room so that CO2 could exist
as a liquid?– Increase pressure above 5.1 atm and temperature between -56.5 and -31 C
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Vocabulary
• Densities– Water (ice) = 1 g / cm3
– Rocks = 3 g / cm3
– Iron = 8 g / cm3
• Mercury 5.4 g / cm3
– Rocks and iron
• Jupiter 1.3 g / cm3
– NOT made of ice!
• Moment of inertia factor K– Uniform sphere K = 0.4– Mass more concentrated in
the center K < 0.4 planet is differentiated
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The Moon
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The Moon• Regions:
a) Mareb) Highlands
• Mare– Albedo: low– Age: young (How do we measure age?)– Crater density: low– Main feature: lava flows– Primary rock type: basalt (low albedo)
• Highlands– Albedo: high– Age: old– Crater density: high– Main feature: impact craters– Primary rock type: impact breccias, highland pristine rocks
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The Moon
• Impact processes:– Simple impact craters– Complex impact
craters mounds how do they form?
– Impact basins when were they formed?
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The Moon
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Rocks