Constructive and Destructive Forces

Rocks are being weathered when

• acid rain causes features of buildings and statues to become more rounded and less detailed.

• water freezes and thaws inside small cracks, causing pieces of rock to break off.

• tree roots force their way into small openings, and pieces of the rock break off as the roots make the openings larger.

• all of these

What is the most significant difference between the way that erosion and a volcanic eruption change the surface of the Earth?

• A volcanic eruption affects a large area, but erosion only changes small areas at a time.

• A volcanic eruption creates new land, but erosion carries land away.

• A volcanic eruption carries land away, but erosion creates new land.

• A volcanic eruption comes from molten rock, but erosion only comes from water.

Which of the following Earth processes takes place most rapidly?

• weathering of a large rock by plant roots

• building of a mountain range by volcanic eruption

• eroding of a rock cliff by gentle ocean waves

• formation of a crack in the ground by an earthquake

Many landforms are created through the processes of weathering and erosion. Which statement correctly compares weathering and erosion?

• Erosion can make weathering happen slower by breaking up rocks.

• Weathering can help erosion happen faster by breaking up rocks.

• Weathering and erosion must always take place at the same time.

• Weathering and erosion are two names for the same process.

Which of the following causes weathering in rocks?

• sun and wind

• deposition

• barometric pressure

• freezing and thawing

Which natural event that changes the surface of the Earth can be defined as a trembling or shaking movement of the Earth's crust?

• earthquake

• glacier

• tidal wave

• volcano

Which surface feature forms from the deposition of sand, mud and other particles?

• delta

• cave

• cliff

• valley

Which geographical feature is formed by water erosion?

• canyon

• volcano

• plain

• sand dune

Which of the following best describes a fault line?

• a raised peak in the Earth's surface

• a crack in the Earth's crust

• a large body of freshwater

• a solid sheet of ice and snow

Landforms are made by the forces of wind, water, and ice at the earth's surface. A wide, U-shaped valley would most likely be formed by

• a glacier.

• the wind.

• a flood.

• a drought.