The basic premise of the ____________________ theory is that, as ...

[PhilipSeeMore]

The basic premise of the ___________________ _ theory is that, as Earth travels through space, three separate cyclic movements combine to produce variations in the amount of solar energy that falls on Earth.
  Fill in the blank with correct word.

Question 2

When an oceanic plate encounters a lighter continental plate, it responds by diving under it, in a process called ___________________ _.
  Fill in the blank with correct word.

[aprice35067]

Answer to Question 1

ANSWER: Milankovitch

Answer to Question 2

ANSWER: subduction