Rock Strata

Rock Strata and Timeline

By Ali Uyanik

​Why do you think it's important for scientists to study the layers of rock? What kind of information could they learn about Earth's past by looking at them?

Multiple Choice

Rock layers are called __________.

• rocks
• sediments
• strata
• layers

Multiple Choice

The youngest rock layers are found on the _________ .

• top
• middle
• bottom

Multiple Choice

The oldest rock layers are found on the ___________.

• top
• middle
• bottom

Multiple Choice

The ______________________ states that as layers accumulate over time, the rock at the bottom is older than the rock toward the top.

• principle of superposition
• law of original horizontality
• principle of lateral continuity
• theory of uniformitarianism

​Grand Canyon

Multiple Choice

The _________ was used as a prime location to see rock strata

• Great Barrier Reef
• Grand Canyon
• Mount Everest
• Yellowstone National Park