Grade 4 Module 3 Twig

Front

What are glaciers?

Back

Glaciers are large masses of ice that move slowly over land. They are not solid and can flow.

Front

Which layer of rock is most likely the oldest?

Back

The layer containing trilobites is the oldest because older layers are found at the bottom.

Front

What color layer in a rock basin typically has the youngest rocks?

Back

The yellow layer usually has the youngest rocks, as younger layers are deposited on top.

Front

Are the rocks at the bottom of the Grand Canyon the oldest?

Back

True, the rocks at the bottom of the Grand Canyon are the oldest due to the process of sedimentary layering.

Front

What does erosion mean?

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by natural forces such as wind or water.

Front

Which natural force does not cause erosion?

Back

The sun does not cause erosion; it can cause weathering but not the physical removal of material.

Front

What is sedimentary rock?

Back

Sedimentary rock is formed from particles of sand, shells, pebbles, and other fragments of material that accumulate in layers.

Front

What is the process of sedimentation?

Back

Sedimentation is the process by which particles settle out of a fluid and accumulate as layers.

Front

What is the significance of fossils in rock layers?

Back

Fossils help scientists determine the age of rock layers and the environment in which the organisms lived.

Front

What is the rock cycle?

Back

The rock cycle is the continuous process of rock formation, breakdown, and reformation through various geological processes.