Grade 4 Module 3 Twig

Front

What are fossils?

Back

Fossils are the preserved remains or traces of animals, plants, and other organisms from the past.

Front

What does it mean when we say fossils are as old as the layer they are found in?

Back

It means that the age of the fossils is the same as the age of the rock layer they are located in.

Front

What is weathering?

Back

Weathering is the process of breaking down rocks into smaller pieces by natural forces like wind, water, and ice.

Front

What is erosion?

Back

Erosion is the process of moving weathered rock and soil from one place to another, often by water, wind, or ice.

Front

What natural forces can cause weathering and erosion?

Back

Wind and glaciers are two natural forces that can cause weathering and erosion.

Front

Why are the rocks at the bottom of the Grand Canyon the oldest?

Back

They are the oldest because they were formed first, and newer layers of rock were deposited on top of them over time.

Front

What is sediment?

Back

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

Front

Where does sediment in a basin typically come from?

Back

Sediment in a basin typically comes from the wearing down of mountains and other landforms.

Front

How do oceans and streams change landscapes?

Back

Oceans and streams change landscapes by eroding land, depositing sediment, and shaping the land over time.

Front

What is the role of glaciers in shaping landscapes?

Back

Glaciers can carve out valleys and shape mountains as they move slowly over land.