One way to determine the age of a glacier is to measure its?

They pierce the glacier and count the rings that formed in the core.

Explanation:

The air particles form different rings, each year, in the core of the glaciers. Therefore, when scientists want to determine the age of glaciers, they pierce the glacier and count these cores, so they can determine how many years have passed since the creation of that glacier.

the answer is learned

b. examine and describe cells