18. about how many times larger is earth's diameter compared to
the moon's?
a. 2 times
c. 10 times
e. 100 times
b. 4 times
d. 25 times

Which event had the greatest impact on culture of south america

The magnitude of an earthquake is typically calculated according to the scale.           a. mercalli   b. fujita   c. richter   d. saffir-simpson  

Which component of a milankovitch cycle is related to periodic ice ages throughout earth’s history?