____ occurs when most of the material collapsing to form a protostar has fallen into a disk around ...

____ occurs when most of the material collapsing to form a protostar has fallen into a disk around the star and a strong wind from the warm protostar ejects material from its poles.
 
  a. An emission nebula
  b. Hydrostatic equilibrium
  c. The proton-proton chain
  d. The thermonuclear fusion of hydrogen
  e. A bipolar outflow

Question 2

____ orbit is one in which an object orbiting Earth has an orbital period equal to the rotation period of Earth.
 
  a. A daily
  b. A lunar
  c. An epicycle
  d. A geosynchronous
  e. An open

Question 3

Convection is important in stars because it
 
  a. increases the temperature of the star.
  b. mixes the gases of the star.
  c. transports energy outward in the star.
  d. carries the neutrinos to the surface of the star where they can escape.
  e. b and c