The Crab Nebula is a bright, long-lasting supernova remnant that ...

[altibaby]

The Crab Nebula is a bright, long-lasting supernova remnant that was made by a ________ supernova.
 
  Fill in the blank(s) with correct word

Question 2

Comparing the densities of the Moon and Mercury, we find:
 
  A) the Moon is slightly denser than Mercury.
  B) similar in surface appearance, they are also similar in density.
  C) that density increases as we go outward from the Sun.
  D) the Moon's is similar to Earth's crust, while Mercury's is similar to the entire Earth.
  E) both are much denser than our water-covered planet.

[tanna.moeller]

Answer to Question 1

type II

Answer to Question 2

D

[altibaby]

TY

[tanna.moeller]

You're welcome