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

• True

• False

Wind and water continue to change landscapes today.

• True

• False

Changes to landscapes are always catastrophic.

• True

• False

Weathering and erosion affect structures built by people.

• True

• False

All landscape change is caused by humans.

• True

• False

Wind and glaciers can cause weathering and erosion.

• True

• False

Glaciers are solid so they cannot move.

• True

• False

Water is the only cause of erosion.

• True

• False

Rivers and streams carry no sediment.

• True

• False

Fossils found in landscapes are as old as the layer in which they are found.

• True

• False