Author Question: Eurypterids are a subclass of the cephalopods that are excellent guide fossils. Indicate whether ... (Read 13 times)

torybrooks · **on:** Jul 13, 2018

Eurypterids are a subclass of the cephalopods that are excellent guide fossils.
Indicate whether the statement is true or false

Question 2

Orbital eccentricity refers to ____.
A)the need to add a leap day every four years
B)variation in the timing of Earth's equinoxes
C)how much Earth is tilted on it's axis
D)how close Earth is to the Sun
E)how circular or elliptical Earth's orbit is