Grade 4 Module 3 Twig

Front

What is sediment?

Back

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

Front

True or False: Mountain streams carry sediment.

Back

False. Mountain streams are usually pure water and do not carry sediment.

Front

What causes erosion?

Back

Erosion is caused by natural forces such as wind, water, and ice, as well as human activities.

Front

True or False: All landscape changes are caused by humans.

Back

False. Landscape changes can occur naturally as well.

Front

Which natural force does NOT cause erosion?

Back

The sun does not cause erosion.

Front

Where does sediment in a river basin typically come from?

Back

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

Front

Where do rivers deposit sediment?

Back

Rivers deposit sediment where they meet the sea.

Front

What is the process of wearing down land called?

Back

The process of wearing down land is called erosion.

Front

What is the role of wind in erosion?

Back

Wind can carry away loose particles of soil and rock, contributing to erosion.

Front

What is a tributary?

Back

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