Question

1) Why do the different rocks exposed in the Grand Canyon appear in layers for the most part? Where are the oldest layers of rock found? Where are the youngest rocks found?

Answer 1

Answer: C

Scientists observe the layers for evidence of similar rock types and fossil formations to determine the age of landforms. If they find the same fossil in two different locations, scientists may conclude that those fossils are most likely from the same time period. The same is true for landforms made of certain types of rock. When scientists see layers of similar rock sediments, they use that as evidence to support that are from a similar time period. By analyzing the rock layers, scientists estimate that Earth is 4.6 billion years old.

Step-by-step explanation:

Answer 2

This is what i put:

The Grand Canyon is made up of sedimentary rock; over time, sediments formed into layers. The layers on the bottom are the oldest, and the layers on the top are the youngest and newest.

Try and paraphrase though