The observable ________ is a thin layer of the Sun in which the ...

[Davideckstein7]

The observable ________ is a thin layer of the Sun in which the solar material becomes suddenly much more opaque as we look deeper into the Sun.
 
  Fill in the blank(s) with correct word

Question 2

The first hint of the role of asteroids in extinction of the dinosaurs came from:
 
  A) finding the huge crater in the Yucatan.
  B) finding dinosaur fossils with meteorites imbedded in them.
  C) finding a layer of worldwide iridium enriched dust.
  D) finding that dinosaurs were warm-blooded and smart.
  E) finding that no volcanic eruptions were linked to their disappearance.

[tuwy]

Answer to Question 1

photosphere

Answer to Question 2

C

[Davideckstein7]

Gracias!

[upturnedfurball]

TYSM