Biology Forums - Study Force

The visual pink glow of the Great Nebula in Orion
 
  a. is a Herbig-Haro object.
  b. is a reflection nebula of dust.
  c. is an emission nebula of thin gas.
  d. contains only young low mass stars.
  e. is believed to be about 5 billion years old.

Question 2

Which of the following people did NOT accept a heliocentric model for the universe?
 
  a. Kepler
  b. Copernicus
  c. Tycho
  d. Galileo
  e. Newton

Question 3

Opacity is
 
  a. the balance between the pressure and force of gravity inside a star.
  b. the force that binds protons and neutrons together to form a nucleus.
  c. the force that binds an electron to the nucleus in an atom.
  d. a measure of the resistance to the flow of radiation (photons) through a gas.
  e. the temperature and density at which a gas will undergo thermonuclear fusion.

Question 4

A lunar eclipse can only occur during the full phase.
 
  Indicate whether the statement is true or false

Question 5

____ are small luminous nebulae excited by nearby young stars.
 
  a. T Tauri stars
  b. Herbig-Haro objects
  c. O associations
  d. Bok Globule
  e. Giant molecular clouds

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:white_check_mark: Correct!