The cores of the terrestrial worlds are made mostly of metal ...

[future617RT]

The cores of the terrestrial worlds are made mostly of metal because ________.
 
  A) the terrestrial worlds as a whole are made mostly of metal
  B) metals sunk to the centers a long time ago when the interiors were molten throughout
  C) over billions of years, convection gradually brought dense metals downward to the core
  D) the core contained lots of radioactive elements that decayed into metals

Question 2

Like Saturn's more famous ring system, Jupiter's ring is also made of ice, just older and dirtier than the bright fresh material at Saturn.
 
  Indicate whether the statement is true or false

[Sophiapenny]

Answer to Question 1

B

Answer to Question 2

FALSE

[future617RT]

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