Which of the following describes volcanism? A) the excavation ...

[vicotolentino]

Which of the following describes volcanism?
 
  A) the excavation of bowl-shaped depressions by asteroids or comets striking a planet's surface
  B) the eruption of molten rock from a planet's interior to its surface
  C) the disruption of a planet's surface by internal stresses
  D) the wearing down or building up of geological features by wind, water, ice, and other phenomena of planetary weather

Question 2

If the entire galaxy (with a diameter of 100,000 light years) were represented by a circle with a diameter of 4,400 km (similar to the width of the continental United States), then how far apart would be the Sun and its nearest stellar neighbor,
 
  Proxima Centauri (which is 4.2 light years away)?
  A) about 0.2 meters (about the length of an adult's forearm)
  B) about 200 meters (about 2 football fields)
  C) about 20 meters (about the size of a large classroom)
  D) about 2 meters (about 2 long footsteps)

[beccamahon]

Answer to Question 1

B

Answer to Question 2

B

[vicotolentino]

Thanks

[beccamahon]

Welcome