Weathering, Erosion, and Deposition

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is called

• erosion
• cracking and peeling
• abrasion
• ice wedging

Ice wedging causes mechanical weathering of rock by means of

• heating and cooling
• plant growth
• animal actions
• freezing and thawing of water

What kind of weathering causes mineral composition to change?

• mechanical weathering
• permeable weathering
• chemical weathering
• general weathering

A rock containing iron becomes soft and crumbly and reddish-brown in color.  It probably has been chemically weathered by

• abrasion
• carbon dioxide
• oxygen
• acid rain

The most important factors in determining the rate of weathering are

• carbon dioxide and acid rain
• abrasion and acids from plant roots
• animal actions and oxygen
• surface area, rock type, and climate

A marble statue is left exposed to the weather.  Within a few years, the details of the statue have begun to weather away. This weathering is probably caused by

• oxygen in the air
• carbonic acid in rainwater
• lichens
• abrasion

A permeable rock weathers easily because it

• is made up of small particles
• contains many small, connected air spaces
• is made up of only one mineral
• is made up of many minerals

The process by which natural forces moved weathered rock and soil from one place to another is called

• soil conservation
• deposition
• abrasion
  
• erosion

Landslides, mudflows, slump, and creep are all examples of

• mechanical weathering
• runoff
• mass movement
• soil formation

Mass movement is caused by

• plucking and abrasion
• gravity
• chemical weathering
• erosion and deposition