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.

i think it is d. e because the next one is igneous.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e