Which of the following sequences correctly describes the stages of life for a low-mass star?
A) protostar, red giant, main-sequence, white dwarf
B) protostar, main-sequence, white dwarf, red giant
C) white dwarf, main-sequence, red giant, protostar
D) protostar, main-sequence, red giant, white dwarf
E) red giant, protostar, main-sequence, white dwarf
Question 2
What happened to all of the quarks that existed freely during the particle era?
A) They froze out of the soup of particles at the end of the era.
B) They combined in groups to make protons, neutrons, and their antiparticles.
C) They evaporated.
D) They combined in groups to make electrons and neutrinos.
An overview of the stages of translation
These species are all at risk of extinction. Species with slow life-h
Star Map
Tornado Destruction - Loss of Life
Climate models the flow of mass and energy
Mass spectrometry for identifying an unknown protein isolated from a 2D gel