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ASTRO 205 Final Exam Content 4 Study Questions and Answers Rated A
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ASTRO 205 Final Exam Content 4 Study Questions and Answers Rated A
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ASTRO 205 Final Exam Content 4 StudyQuestions and Answers Rated A.
Why do scientist believe liquid water existed on Mars?
✔✔The existence of ancient river beds that had to have been formed by
liquid.
What are Mars' polar caps made of?
✔✔Partially frozen CO2 but also frozen water
Where does most of mars water exist today ?
✔✔Frozen underground
What makes a planet habitable?
✔✔Planetary size (smaller worlds cool off), Distance from the sun
(goldilocks zone), rotation of the planet (faster rotation produce protective
magnetic fields)
What distance does a majority of Earth's atmospheric gas exist?
✔✔Troposphere - 10km from surface
What is Primary Atmosphere?
✔✔Formed by new planets by sweeping up gas in the accretion disk.
True or False: All terrestrial bodies lost their primary atmospheres.
✔✔True
, What is Secondary Atmosphere?
✔✔atmospheric gas acquired later by accretion, volcanism, and comet
impacts.
Arrange the Earths atmosphere in ascending order: stratosphere,
troposphere, Exosphere, Mesosphere, Thermosphere.
✔✔Troposphere, Stratosphere, Mesophere, Thermosphere, Exosphere
Why is Earth the only planet with a stratosphere?
✔✔Because it has life that photosynthesizes CO2 and produces Oxygen.
Protective Ozone layer exists in stratosphere.
Describe temperature curve in Troposphere:
✔✔Gradually decreasing until stratosphere. 0-10km
Describe temperature curve in Stratosphere:
✔✔Gradually increasing until mesosphere 10-50km
Describe temperature curve in Mesosphere:
✔✔Gradually decreasing until Thermosphere 50-80km
Describe temperature curve in Thermophere:
✔✔Temperature slightly rises with altitude 80-200km (location of
ionosphere)
Describe temperature curve in Exosphere:
✔✔slightly rises with altitude, warmed by x-rays and UV-rays
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