Weathering, Erosion, and Deposition

The process that breaks down rocks and other materials on Earth's surface is called

• weathering
• erosion
• soil conservation
• decomposition

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 (humid)

• Cold and Dry (arid)

• Hot and Cold

• Cold and Wet (humid)

The diagrams shows a rock with water trapped in the cracks during the day and at night. 

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

Which are the two factors that affect the rate at which chemical weathering occurs?

• climate and volcanoes

• climate and hurricanes

• mechanical weathering

• type of rock/composition and climate

Which is an example of chemical weathering that causes rust that forms on rocks or metal because of extended exposure to oxygen?

• carbonation (carbon dioxide --> carbonic acid)

• hydrolysis

• oxidation (oxygen)

• biological weathering (living organisms)

This type of weathering occurs when rocks weaken then break down due to chemical changes in the composition of the rock.

• mechanical weathering
• chemical weathering
• erosion weathering
• deposition

How might a weathered mountain appear different than an unweathered mountain?

• Weathered mountain would be taller.

• Weathered mountain would be rounder and less jagged.

• Weathered mountain would be more jagged and less rounded.

• Weathered mountain would have no trees.

Weeds growing into the cracks in a sidewalk and the sidewalk begins to crumble is an example of:

• mechanical weathering
• chemical weathering

Which of the following is an example of chemical weathering?

• Acid rain dissolving limestone
• roots breaking into concrete
• paper being ripped
• Water running over rocks