Which mission passed the bow shock in the Universe?

Which mission passed the bow shock in the Universe?
 
  a. Cassini-Huygens
 b. Interstellar Boundary Explorer
  c. Voyager I
 d. Voyager II
 e. Kepler

Question 2

Earth displays slower erosion than any other Terrestrial planet.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 3

Large molecular clouds will form into protostars because of ____.
 
  a. the thermal motions of the atoms in the gas cloud
  b. gravitational contraction
 c. radiation pressure from nearby stars
 d. the temperature reaching a critical point
 e. condensation of dust and gas

Question 4

Most of Earth's history has been destroyed by an active crust and erosion.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 5

Molecules in the interstellar medium emit radiation at what wavelengths?
 
  a. radio
 b. microwave
 c. visible light
  d. ultraviolet
 e. X-ray

Question 6

The first stage in planetary evolution is cratering.
 
  a. True
  b. False
  Indicate whether the statement is true or false