Question

how might a geologist study the history of earth?

Explanation:

Geologists study Earth's history by examining rock layers (stratigraphy), fossils which provide information about past life - forms, and using radiometric dating to determine the age of rocks and fossils. They also study geological structures like folds and faults to understand past tectonic activities.

Answer:

By examining rock layers, fossils, using radiometric dating, and studying geological structures.