Which of the following has been used to reconstruct past climates?
A) analysis of air bubbles trapped in ice
B) study of documents describing floods,droughts and crop yields
C) the ratio of oxygen 18 to oxygen 16 in the shells of marine organisms
D) study of geologic formations
E) all of the above

Question

Quizplus · Accepted Answer

All of the given options have been used to reconstruct past climates. Analysis of air bubbles trapped in ice gives information about past atmospheric composition, study of documents provides information about weather extremes and crop yield changes, ratio of oxygen 18 to oxygen 16 in marine shells gives information about past ocean temperature, and study of geologic formations provides information about past climate and environment changes. Therefore, all these methods have been used to understand past climate.

Which of the Following Has Been Used to Reconstruct Past