Soil Erosion and Weathering

Which of the following probably did not cause this statue to wear down?

• Rain
• Wind
• Snow
• Animals

How does freezing water cause the weathering of rocks?  The freezing water—

• keeps the rocks in place
• makes the rocks last longer
• expands cracks and breaks rocks
• causes rocks to fall in landslides

What is mechanical weathering?

• Process through which rocks are physically broken into smaller pieces.
• Rocks are broken down through chemical changes.
• Rocks are worn away from acid in plant roots.
• Rocks broken down by machinery.

How do plants weather rocks?

• during photosynthesis
• when roots grow into cracks of rocks and expand the rock
• when the plant moves water from the roots to the leaves

The process by which water, ice, wind or gravity moves weathered rock and soil from one place to another.

• weathering
• erosion
• deposition
• dumptruck

These rocks were made smooth by wind blowing smaller rock particles across their surface through friction. This is an example of:

• ice wedging

• chemical weathering

• acid rain

• abrasion

Flood water pounding against a canyon wall and wearing it down

• Weathering
• Erosion
• Deposition

Rain washing away soil from a hillside

• Weathering
• Erosion
• Deposition

Muddy water being carried away by a fast-moving river

• Weathering
• Erosion
• Deposition 

All of the following are causes of physical weathering except...

• plant growth
• wind
• acid rain
• running water