Weathering and Erosion

Which of the following is NOT a type of chemical weathering?

• water
• carbon dioxide
• ice wedging
• living organisms secreting acid to break down rocks

What is weathering?

• The process by which
  water, ice, wind or gravity
  moves fragments of rock
  and soil.
• The process by which
  water, ice, wind or gravity
  deposit rock sediments
  and soil in a new place.
• The breaking down of
  Earth’s crust into smaller
  and smaller pieces.

What is erosion?

• The process by which
  water, ice, wind or gravity
  moves fragments of rock
  and soil.
• The process by which
  water, ice, wind or gravity
  deposit rock sediments
  and soil in a new place.
• The breaking down of
  Earth’s crust into smaller
  and smaller pieces.

Which of the following is NOT a type of physical weathering?

• burrowing plants
• ice wedging
• plant roots
• acid rain

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

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

Which of the following is an example of mechanical weathering?

• Acidic groundwater dissolving limestone
• frost wedging
• Paper being burned

The diagrams  shows a natural process that weathers rock.
 Which statement best explains why this process results in weathering?

• frozen water acts as a solute
• water expands when it freezes
• the mass of water increases when it freezes
• frozen water dissolves most types of rock

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.

Which type of climate will have faster chemical weathering?

• Hot and Wet
• Cold and Dry
• Hot and Cold
• Cold and Wet

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