Author Question: A higher 18O/16O ratio in ocean sediment cores indicates a ________ climate, and a higher 18O/16O ... (Read 87 times)

s.tung · **on:** Jul 14, 2018

A higher 18O/16O ratio in ocean sediment cores indicates a ________ climate, and a higher 18O/16O ratio in ice cores indicates a ________ climate.

A) cooler; warmer
B) warmer; cooler
C) cooler; cooler
D) warmer; warmer

Question 2

Between 1950 and 2010, approximately how many tornadoes were recorded in the United States?

A) 5,000
B) 15,000
C) 33.000
D) 54.000