Weathering (Gizmo)

There are two types of weathering:

• mechanical and chemical
• solid and liquid
• liquid and gaseous
• water and wind

When rocks are physically broken down:
When the minerals in the rock are changed molecularly:

• Mechanical weathering; chemical weathering
• Chemical weathering; mechanical weathering
• Wind erosion; water erosion
• Water erosion; wind erosion

Which is NOT a way rocks can be worn down by abrasion?

• When glaciers drag rocks along the bottom which rub against other rocks
• When wind carries sand which strikes the surface of rocks
• When rivers carry sediment which rubs against other rocks
• When water dissolves certain minerals in rock

What type of rock is affected by dissolving?

• Limestone
• Granite
• Sandstone
• Shale

As water freezes into ice, it expands and pushes rock apart forming new cracks:

• Frost wedging
• Abrasion
• Dissolving
• Clay formation

Which part of a rock will undergo rusting?

• The surface
• The interior
• Both

Pressure release; dissolution

• Exfoliation; carbonation
• Hydrolysis; oxidation

Clay formation; rusting

• Exfoliation; carbonation
• Hydrolysis; oxidation

Weathering form chemicals produced by colonies of algae and fungi.

• Salt weathering
• Heat expansion
• Root weathering
• Lichen growth

Weathering that occurs when crystals grow.

• Salt weathering
• Heat expansion
• Root weathering
• Lichen growth