Landforms

Students propped up one end of a tray of sand. They also set up a jar of water and a rubber hose so that water flowed over the sand. They observed how the moving water carried the sand downhill and made a small pile of sand at the bottom of the tray. When the students created the small pile of sand at the end of the flow of water, they modeled the formation of which of the following?

• A. Dunes
• B. Canyon
• C. Plain
• D. Delta

This rock formation formed over many millions of years. What force most likely created it?

• A. A glacier pushing rocks ahead of it
• B. A river bringing rocks down a mountain
• C. Wind-blown sand carving large rocks
• D. A volcano blasting rocks great distances

1.  What process is responsible for creating a delta?

• weathering
• erosion
• deposition
• water

What term describes the movement of rock materials from one place to another?

• erosion
• flooding
• deposition
• weathering

Which term best describes the mechanical processes that break down rock?

• gravity
• deposition
• weathering
• erosion

Over many years the bottom of a lake gets higher and higher. What could cause this slow change?

• A. The climate in the area gets warmer.
• B. Sediments are deposited in the lake.
• C. The Sun evaporates the water.
• D. The area around the lake experiences a drought.

What is sediment?

• the process of rocks being broken down and carried away
• bits of rock, sand, and silt caused by the weathering of rocks
• the top layer of the soil
• decaying plant or animal material 

______________ is the slow process that breaks rock down into smaller pieces. This can be caused by flowing water, rain, and wind.

• volcano
• faults
• weathering
• erosion

A ______ is the sudden downhill movement of loose rock and soil. Heavy rain can cause this to move quickly down a slope.

• landslide
• tsunami
• faults
• earthquakes

Wide, flat areas of land are called ______.

• plains
• volcanos
• mountains
• valleys