Which of the following is the most useful physical sign of long-ago climate change?
A)coral reefs
B)fossilized grains
C)ice cores extracted from ancient glaciers in Greenland
D)annual growth rings in trees

Question

Quizplus · Accepted Answer

Ice cores extracted from ancient glaciers in Greenland provide a comprehensive record of past climate changes, including temperature, atmospheric composition, and precipitation patterns. The layers of ice cores can be analyzed to identify changes in temperature or the presence of compounds like carbon dioxide, methane, and nitrous oxide, which can indicate changes in the atmosphere over time. This makes them the most useful physical sign of long-ago climate change. The other options, while useful in their own right, do not provide as complete a record of past climate changes as ice cores.

Which of the Following Is the Most Useful Physical Sign