What is NOT one of the ways that oceans help to regulate climate?
A. Marine animals create shells from CaCO3.
B. Ocean upwelling brings nutrients to surface.
C. Dead marine life are deposited in ocean sediment.
D. Marine plants absorb CO2 in photosynthesis.
E. Methane hydrates are deposited in ocean sediment.
Question 2
Which Milankovitch cycle refers to a wobbling of the Earths axis of rotation?
A. orbital shape
B. axial precession
C. axial tilt
D. orbital shift
E. axial flip