Drag the descriptions in how the formation of a canyon occurred with the first step on the top.

1. The river continues to erode the land even more creating the "V"-shape valley.
2. The river begins to erode the land forming a channel for water to follow.
3. For millions of years, the annual snowmelt and rainfall erode away the lower half of the V-shaped valley creating the vertical sides of the canyon.
4. A river flows across flat land from annual snowmelt or rainfall.

Drag the descriptions in how the formation of a sand dune occurred with the first step on the top.

1. The wind-blown sand eventually hits an obstacle, like a rock or a plant, causing the sand to drop and pile up (deposition).
2. Over time, the mound grows bigger as more sand is added, eventually forming a sand dune.
3. As more sand grains hit the obstacle, they start to pile up (deposition), forming a small mound.
4. Wind blows across loose sand, picking up tiny grains and carrying (erosion) them through the air.

Drag the descriptions in how the formation of frost wedging occurred with the first step on the top.

1. Water from rain or melting snow seeps into cracks in rocks.
2. When the temperature drops, the water in the cracks freezes and turns into ice (weathering).
3. As the water freezes, it expands, pushing the cracks in the rock wider (weathering).
4. Over time, the repeated freezing and thawing causes the rock to break apart into smaller pieces (weathering).

Match each landform photo to the description that best describes how the landform is made.

Draggable item	arrow_right_alt	Corresponding Item
Formed when a large, wide glacier slowly moves through the area, weathering rock and eroding sediments	arrow_right_alt
Formed when ocean waves crash against rock for many years	arrow_right_alt
Formed when a river weathers rock and erodes sediments over millions of years	arrow_right_alt
Formed when sediments are deposited at the mouth of a river	arrow_right_alt

Sort the items on the left based on their agent of change.

Sort the items on the left based on their agent of change.

Sort the items on the left based on their agent of change.