ASTR 121|47 Midterm 2 Questions Well Answered| Success Guaranteed
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Course
ASTR 121
Institution
ASTR 121
3 key processes from solar nebula to spinning disk - ️️1. heating 2. spinning 3. flattening
4 categories of materials in the solar nebula - ️️1. hydrogen and helium 98% 2. hydrogen compounds 1.4% 3. rock 0.4% 4 metals .2%
4 Major clues that show how solar system was formed - ️️1. Patt...
ASTR 121|47 Midterm 2 Questions Well
Answered| Success Guaranteed
3 key processes from solar nebula to spinning disk - ✔ ✔ 1. heating 2. spinning 3. flattening
4 categories of materials in the solar nebula - ✔ ✔ 1. hydrogen and helium 98% 2. hydrogen
compounds 1.4% 3. rock 0.4% 4 metals .2%
4 Major clues that show how solar system was formed - ✔ ✔ 1. Patterns of motion among large
bodies 2. Two major types of planets 3. asteroids and comets 4. Exceptions to the rules
4 ways in which earth is unique among terrestrial worlds - ✔ ✔ 1. Surface liquid water 2.
Atmospheric oxygen 3. Plate tectonics 4. Climate stability
Basic geology of Venus - ✔ ✔ Volcanism and tectonics
Carbon dioxide cycle - ✔ ✔ The natural action of how carbon is cycled throughout the atmosphere
Consequences of global warming - ✔ ✔ 1.Polar regions warm, causing ice to melt, 2. Oceans warm 3.
Salt content changes 4. Evaporation from oceans will increase leading to more intense storms 5. A rise in
sea level
Conveyer- like action - ✔ ✔ Plate tectonics act like a giant conveyer belt for earths lithosphere,
continually recycling the seafloor and building up the continents
Core- mantle crust structure of terrestrial planets - ✔ ✔ Core- Highest density material consisting of
metals like nickel and iron
Mantle- Rocky, moderate density consisting mostly of minerals that contain silicon, oxygen, etc. that
forms a mantle surrounding the core
Crust- lowest density rock, like granite and basalt, forming a thin crust, representing the world's outer
skin
Describe the planetary properties we can measure with current detection methods - ✔ ✔ 1. orbital
period and distance - current detection methods all tell orbit, which can then prove distance
2. orbital eccentricity - how circular planets orbits are, which shows how close they get to the sun too
3. planetary mass - a more massive planet will cause its star to move at a higher velocity around the
center of mass
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