When considering whether the density of the universe is above or ...

[Jipu 123]

When considering whether the density of the universe is above or below the critical density, what needs to be included in the measurement of density?
 
  A) ordinary matter
  B) ordinary matter and dark matter
  C) ordinary matter, neutrinos, gravity waves and electromagnetic energy
  D) ordinary matter, dark matter and electromagnetic energy
  E) ordinary matter, dark matter, neutrinos, gravity waves, electromagnetic energy and dark energy

Question 2

Rocky debris larger than 100 meters in diameter seen to be orbiting the sun are called ________.
 
  Fill in the blank(s) with correct word

[lou]

Answer to Question 1

E

Answer to Question 2

asteroids

[Jipu 123]

Excellent

[isabelt_18]

Gracias!