Which of the following planets has the least substantial atmosphere?
A) Mercury B) Mars C) Earth D) Neptune E) Venus
Question 2
What do we mean by inflation?
A) the rapid expansion of the universe, driven by white dwarf supernova, that we still observe today
B) the expansion of universe starting with the instant after the Big Bang
C) the sudden release of photons when particles and antiparticles annihilate each other
D) a sudden expansion of the universe driven by the energy released when the strong and electroweak forces froze out from the GUT force
E) the photons released when electrons and protons first combined, forming the Cosmic Microwave Background Radiation
the comet Encke riding along its pebbly trail of debris (long diagonal line) between the orbits of M
Composition of the Atmosphere
The Atmosphere
Earth’s Major Lithospheric Plates
Earth as a System: The Hydrologic Cycle
Similar Rock Outcrops on Mars and Earth