Many scientists suspect that Venus has a stronger and thicker lithosphere than Earth. If this is true, which of the following could explain it?
A) the apparent lack of plate tectonics on Venus
B) the slow rotation of Venus
C) the high surface temperature that has baked out all the liquid water from Venus's crust and mantle
D) the smaller size of Venus, which has allowed it to lose much more internal heat than Earth
Question 2
The maria on Ganymede were formed by
A) gravitational interactions with Callisto and Europa.
B) plate tectonics.
C) basalt erupting onto the surface.
D) sulfur spewed from volcanoes.
E) water erupting and spreading over the surface.
Changes in Earth's atmospheric carbon dioxide levels over geological time.
The open ocean is the most extensive biome on earth.
Photosynthetic Organisms Changed Earth's Atmosphere
Animation of the apparent retrograde motion of Mars in 2003 as seen from Earth
Atmosphere of Venus in UV, by Pioneer Venus Orbiter in 1979
The Sun as it appears from the surface of the Earth at Sunset.