What do we mean by a runaway greenhouse effect?
A) a greenhouse effect that starts on a planet but later disappears as gases are lost to space
B) a greenhouse effect that heats a planet so much that its surface rock melts
C) a process that heats a planet like a greenhouse effect, but that involves a completely different mechanism of heating that doesn't actually involve greenhouse gases
D) a greenhouse effect that keeps getting stronger until all of a planet's greenhouse gases are in its atmosphere
Question 2
Neutron stars and black holes are formed by
A) the star formation process.
B) mass transfer in binary star systems.
C) novae.
D) type I supernovae.
E) type II supernovae.