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Astronomy 121|93 Exam Questions Perfectly Answered| Guaranteed A+
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4 components of the Earth's Interior - ️️1. Thin crust 2. Semi-solid mantle 3. Liquid outer core 4. Solid inner core 4 types of boundaries between plates - ️️1. mid-ocean ridge 2. sliding plates 3. ocean trench 4. mountains 5 components of atmosphere (closest-farthest) - ️️1. T...

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  • August 26, 2024
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  • 2024/2025
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Astronomy 121|93 Exam Questions
Perfectly Answered
4 components of the Earth's Interior - ✔ ✔ 1. Thin crust

2. Semi-solid mantle

3. Liquid outer core

4. Solid inner core

4 types of boundaries between plates - ✔ ✔ 1. mid-ocean ridge

2. sliding plates

3. ocean trench

4. mountains

5 components of atmosphere (closest-farthest) - ✔ ✔ 1. Troposphere

2. Stratosphere

3. Mesosphere

4. Thermosphere

5. Exosphere

7 Stages of the Earth's atmosphere - ✔ ✔ 1. Proto-atmosphere

2. Early atmosphere

3. Secondary atmosphere

4. Cooling phase

5. Photodisinegration

6. Carbonate rock formation

7. Life

Based on thenoble gas percentages, how much more massive was Mar's early atmosphere if it was
Venus-like in composition? - ✔ ✔ 4x

, Carbonate Rock Formation - ✔ ✔ H20 and CO2 react in the oceans to become carbonate rocks and
O2

Cooling phase - ✔ ✔ As atmosphere cools, H2O rains out the become the oceans

Density of the Earth - ✔ ✔ 5.5 gm/cc

Does a large planet have more or less outgassing? - ✔ ✔ more

Early atmosphere - ✔ ✔ atoms were heated by sun's radiation, their kinetic energy was increased.
Lightest elements were heated and increased their velocity (surpassing escape velocity) and they left the
Earth.

Erosion - ✔ ✔ wind, water, slumping. Most early cratering erased by erosion on planets with thick
atmospheres.

Even if Mar's atmosphere was 100% O2, why could humans not live on the surface without life support
systems? - ✔ ✔ the atmosphere is too thin

Evidence for a lower amount of core heat for Mars is given by - ✔ ✔ a low mass for Mars

large volcanos

large crustal cracks

numerous craters

Given the range of temperatures on Mercury, if water existed on Mercury would we find it in all three
states(solid, liquid and vapor)? - ✔ ✔ yes

greenhouse rate is controlled by ... - ✔ ✔ distance from the sun

amount greenhouse gases in the atmosphere

How a planet evolves - ✔ ✔ Distance from the sun

Mass and radius of the planet

chemical reactions

geological activity

living organisms

How big is the moon compared to the Earth? - ✔ ✔ 1/4 the size of the Earth

How do the mean densities of Ganymede and Callisto compare with the mean densities of the Earth and
the Moon? - ✔ ✔ less than the moon's, less than the Earth's

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