A period of minimal sunspot activity between 1645 and 1715 is known as
A) the quasi-biennial oscillation.
B) the Maunder Minimum.
C) eccentricity.
D) a millennial-scale oscillation.
Question 2
The Milankovitch cycles deal with these changing characteristics of Earth: ________, ________, and ________.
Fill in the blank(s) with the appropriate word(s).