Slow Processes

Which landform is found only where land meets an ocean?

• plain

• valley

• coastline

• mountain

How does weathering help form a sandy beach by the ocean?

• Melting glaciers deposit grains of sand.

• Sandstorms deposit sand from nearby deserts.

• Waves break rocks into pieces, making grains of sand.

• Chemicals in the waves dissolve large rocks into sand.

A deep cave was discovered underground. Scientists found that the walls of the cave were made of limestone. The cave most likely formed through weathering by:

• glacial ice

• weak acid

• heavy wind

• high waves

In the desert, wind carrying sand causes abrasion to rocks. What will happen to the rocks over time?

• They will crack.

• They will blow away.

• They will become bigger

• They will become smoother.

In what way is a river valley like a canyon?

• Both are flat areas of land.

• Both can be found near oceans.

• Both are formed by moving water.

• Both rise high above the land around them.

How do weathering and erosion cause a landslide?

• Rock and soil slip downhill.

• Moving ice deposits sediment.

• Weak acid dissolves limestone.

• Sandstorms blow sediment against rock.

Last winter, Julie noticed a rock in her yard that had a small crack in it. After winter passed, she looked again and found that the crack had changed. What most likely happened to the crack during the winter?

• It got bigger because the water froze and expanded.

• It got smaller after the water deposited sediment.

• It got bigger because the water eroded the rock.

• It got smaller when the water mixed with dust.

A group of large boulders are in the middle of a grassy field. The boulders were once far away from the field. Which of these most likely moved the boulders to the grassy field?

• weathering and erosion by a river

• erosion and deposition by a glacier

• weathering and abrasion by a sinkhole

• abrasion and deposition by a sandstorm

What is weathering?

• dropping of sediment in a new place

• the breaking apart or wearing away of rock

• movement of sediment from one place to another

• the creation and destruction of landforms by weather

A sandstorm can move sand over great distances. Which most likely happens during a sandstorm?

• Sediment is deposited in a new place.

• Rocks and soil slide down a hillside.

• Water freezes and splits rock.

• A cave forms underground.