The pressure of an interstellar gas cloud depends on the cloud's ____________________ and ...

The pressure of an interstellar gas cloud depends on the cloud's ____________________ and ____________________.
 
  Fill in the blank(s) with correct word

Question 2

Getting a cold is like building the chemical elements in nucleosynthesis.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 3

____________________ appear reddish in color due to the light emitted by the Balmer series of the hydrogen atom.
 
  Fill in the blank(s) with correct word

Question 4

The Sun is located near a spiral arm.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 5

Energy transport by ____________________ is important when photons cannot readily travel through a gas.
 
  Fill in the blank(s) with correct word

Question 6

Sgr A emits radio waves.
 
  a. True
  b. False
  Indicate whether the statement is true or false