Author Question: Indications of past climates in tree rings are determined by examination of the:a. thickness of ... (Read 137 times)

Starlight · **on:** Jul 13, 2018

Indications of past climates in tree rings are determined by examination of the:a.
thickness of growth rings
b. density of growth rings
c. presence of frost rings
d. all of the above
e. only a and b

Question 2

A high concentration of oxygen 16 found in the ice caves of Antarctica and Greenland would
indicate __________ at the time the ice was formed.
a. cold air temperatures
b. mild winters
c. intense ultraviolet radiation
d. the caves were under the ocean