Unit 8b-Earth's Changing Surface (m)

The breakdown of rock into smaller and smaller pieces by physical or chemical means.

• weathering

• erosion

• deposition

The process by which sediment is transported from one location to another.

• erosion

• deposition

• weathering

The process of eroded materials (sediments) being left in a new location.

• weathering

• erosion

• deposition

Which of the following statements about water and weathering is correct?

• Water is an agent of physical weathering only.

• Water is an agent of chemical weathering only.

• Water is an agent of both chemical and physical weathering.

Which is a cause of physical weathering, but not of chemical weathering?

• Air

• Wind

• Water

How are deltas formed from rivers?

• When the river enters the ocean.

• When the river leaves the mountains.

• When the river meanders across a plain.

Which of the following best describes how erosion by groundwater might create a landform?

• Slightly acidic water dissolves certain rocks underground to form a cavern.

• A stream flowing through a plain gradually wears away the rock and soil to form a valley.

• River water slows down as it approaches the ocean and deposits sediment that builds up to form a delta.

What happens when a stream slows down?

• The stream picks up larger particles.

• The stream has more energy for erosion.

• The stream deposits sediment.

In places where there is loose sediment and strong wind, the wind can pick up the sediment and carry it. When the wind slows, it deposits the sediment. Which type of sediment will be dropped first as the wind slows?

• The lightest

• The smallest

• The heaviest

Which of the following is an ecoregion found in Texas?

• Trans-Peco Desert

• Tropical rainforest

• Tundra