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.
A Star with Three Planets
jellyfish life cycle
After being sure all pads are correctly positioned, use the electromechanical controls to raise the ...
Life cycle of Giardia.
What is the mass % of H2S04 in concentrated sulfuric acid?
Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia).