Rock Layers and Marble Formation

What causes the horizontal patterns in rock layers?

• Layers formed at different times

• Layers formed at similar times

• Water, wind, and erosion.

The layers contain ______ materials due to different conditions on Earth.

• Different

• Similar

Which step comes first in the formation of marble?

• Dead animals get pressed into limestone.

• Heat and pressure turn limestone into marble.

• Dead animals settle on the ocean floor.

• Dead animals break down.

Marble is a type of rock formed from ______.

• Granite

• Limestone

• Sandstone

What process turns limestone into marble?

• Freezing and thawing

• Heat and pressure

• Erosion

Based on the evidence shown, what was the most likely environment of these organisms?

• The environment was most likely covered in rock.

• The environment was most likely cold and icy.

• The environment was most likely underwater.

• The environment was most likely dry and hot.

The diagram shows a core sample of rock taken from a rock layer. What evidence shows that the core sample came from sedimentary rock?

• The core sample has horizontal layer patterns.

• The core sample has layers of plant and animal fossils.

• The core sample has layers of shell and marine life.

• The core sample looks like a cylinder.

The oldest fossils from the Paleozoic era are from which two time periods?

• Cambrian

• Devonian

• Permian

• Ordovician

In which two time periods might scientists find fossils younger than a myriapod fossil?

• Permian

• Carboniferous

• Ordovician

• Cambrian

What most likely caused the rock strata to change?

• Movement of Earth's crust pushed on the sediment layers.

• Mineral colors affected the position of the rock layers.

• Wind caused the many different layers of rock strata.

• Sea waves washed over the rocks and caused curvy patterns.