Question

There are about 40 identified rock layers in the walls of the Grand Canyon. Which statement best explains the significance of these rock layers to earth scientists?

o Changes in the appearance and composition of the rock layers reflect changes in the environment over time.
o changes in the appearance and composition of the rock layers reflect the origin of the Grand Canyon
Changes in the appearance and composition of the rock layers accurately indicate the temperature of the area over time
o Changes in the appearance and composition of the rock layers provide answers as to why the Grand Canyon is so big

Answer 1

Number one: Changes in the appearance and composition of the rock layers reflect changes in the environment over time.

Step-by-step explanation:

They are using the changes to the rocks to infer what has happened in the area.