Weathering, Erosion and Deposition

What happens during the freeze-thaw action in physical weathering?

• Water seeps into cracks, freezes, and expands, causing cracks to enlarge.

• Rocks and sediments grind against each other.

• Animals loosen soil and break rocks.

• Acids make water more acidic.

Which process involves rocks and sediments grinding against each other?

• Abrasion

• Freeze-Thaw Action

• Biological Factors

• Rust Formation

How do biological factors contribute to weathering?

• Animals loosen soil and break rocks; plant roots grow in cracks.

• Acids make water more acidic.

• Iron reacts with oxygen to form rust.

• Water seeps into cracks and freezes.

What effect do acids from volcanoes have on rocks?

• They make water more acidic, speeding up rock breakdown.

• They cause rocks to grind against each other.

• They freeze and expand in cracks.

• They release weak acids from plant roots.

What happens during rust formation in rocks?

• Iron reacts with oxygen and water to form rust, making rocks soft.

• Water seeps into cracks and freezes.

• Animals loosen soil and break rocks.

• Acids make water more acidic.

How do plant roots and lichens contribute to weathering?

• They release weak acids that contribute to rock breakdown.

• They cause rocks to grind against each other.

• They freeze and expand in cracks.

• They make water more acidic.

What is the process called when weathered material moves from one place to another?

• Deposition

• Erosion

• Gravity Movement

• Wind Movement

Which process involves eroded soil and rock being dropped off in a different location?

• Erosion

• Gravity Movement

• Deposition

• Water Movement

What causes materials to move, leading to events like mudslides and landslides?

• Water Movement

• Wind Movement

• Gravity Movement

• River Sediment

What are strategies to reduce landslides?

• Building on steep slopes

• Planting ground cover

• Increasing water flow

• Removing vegetation