Module 3, DQs 1 and 2

Front

What are the oldest rocks in the Grand Canyon?

Back

The rocks at the bottom of the Grand Canyon are the oldest.

Front

What do we call preserved parts of animals and plants found in rock layers?

Back

Fossils.

Front

What happens to sediment when rivers meet the sea?

Back

Rivers deposit sediment where they meet the sea.

Front

True or False: Mountain streams carry pure water and no sediment.

Back

False.

Front

True or False: Oceans and streams continue to change landscapes today.

Back

True.

Front

What is erosion?

Back

Erosion is the process by which natural forces move weathered rock and soil from one place to another.

Front

What is sediment?

Back

Sediment is small pieces of rock, soil, and organic material that are carried and deposited by water, wind, or ice.

Front

What is the process of sediment being laid down called?

Back

Deposition.

Front

What is the significance of the yellow layer in a sedimentary rock diagram?

Back

The yellow layer has the youngest rocks.

Front

What is a tributary?

Back

A tributary is a smaller river or stream that flows into a larger river.