Question

What do the bubbles in ice cores represent?

a.the annual growth or shrinkage of a glacier.

b. more bubbles are indicative of increased precipitation.

c. tiny samples of earth's atmosphere when the ice formed.

d. types of plants that lived in an area.

Answer 1

C.

They are air bubbles and depending on when the ice froze, that is air that can be used at a sample to measure the carbon dioxide levels in the atmosphere at the time of freezing.