This was not a prominent gas in the Earth's early atmosphere
A) methane.
B) ammonia.
C) hydrogen.
D) helium.
E) oxygen.
Question 2
This is the most fundamental reason why Earth currently has an atmosphere
A) strong winds keep the atmosphere moving horizontally above the Earth.
B) the Earth's magnetic field prevents gas molecules from escaping into space.
C) the Earth's gravity is strong enough to prevent most gases from escaping into space.
D) Earth's atmosphere is quite dense, and thus very viscous.
E) the solar wind constantly adds gas particles to the atmosphere.
Water potentials decrease (become more negative) as one moves from soil to plant to atmosphere
Artist's conception of the New Horizons spacecraft passing over Pluto, showing its tenuous atmo
Blue light is scattered more than other wavelengths by the gases in the atmosphere, giving the Earth
Water, Hydrogen, Methane
The Role of Gases in the Atmosphere
Percent of oxygen in the atmosphere versus altitude.