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ASTR 121|47 Midterm 2 Questions Well Answered| Success Guaranteed
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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...

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  • August 26, 2024
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  • 2024/2025
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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 major geological processes - ✔ ✔ 1. Impact cratering 2. Volcanism 3. Tectonics 4. Erosion

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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