Answers | Verified | Updated (Actual Exam) EAPS
105 EXAM #3EAPS 105 Exam 3 Questions with
100% Correct Answers | Verified | Updated
Save
Terms in this set (58)
The components of a primary Hydrogen and Helium
atmosphere
The factors that influence a planet's -Mass, Universal Gravitational Constant, Radius of
escape velocity. the planet.
-v = sqrt(2Gm/r)
-The greater the mass of the planet, the higher the
velocity needed to escape its gravity.
-The greater the radius of the planet, the lower the
velocity needed to escape its gravity.
The factors that influence the -Temperature
velocity of an atmospheric gas -Atomic Weight
molecule.
Which planets have retained their The Gas Giants
primary atmospheres.
, How the Earth obtained most of the 1. Earth could not hold onto its primary atmosphere
oxygen in its atmosphere. because it had too small of an escape velocity.
2. Volcanism brought these to too small an escape
up from Earth's interior. (Water (H20), Carbon
Helium (He) Dioxide (CO2), and Ammonia (NH3))
3. Sunlight broke down NH3 into N2 and H2(H2
then escaped).
Life (microbes) converted most of the CO2 into O2.
The major differences between the -Atmospheric pressure is 90 times greater than on
atmospheres of Earth and Venus. Earth.
-CO2 traps so much heat from the Sun that Venus
has the hottest surface of any planet, 465°C
(860°F) — hot enough to melt lead.
-Sulfuric acid clouds.
The major differences between the -Mars and Venus have similar atmospheric
atmospheres of Venus and Mars. chemistry, but the similarities stop there.
-Venus' atmosphere is 15,000 times denser than
Mars' (Earth's atmosphere is 166 times denser than
Mars').
-Despite the relative percentage of CO2 on Mars,
there is not much of it and thus the heat from the
Sun is not captured to warm its surface.
What Mars' thin atmosphere implies Because Mars' atmosphere is so thin, even high
about the force of its winds. winds on Mars would not pick up objects bigger
than grains of sand.
The problem with the theory that If Mars lost its atmosphere from solar wind
Mars may have lost its atmosphere stripping, then why has Venus not lost its
due to the solar wind. atmosphere as it also does not having a magnetic
field and is even closer to the Sun?