This type of weathering occurs when rock is physically broken down into smaller pieces of rock.

• mechanical weathering

• chemical weathering

• erosion weathering

• deposition

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

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

• ice wedging

• chemical weathering

• acid rain

• abrasion

These rocks were broken apart from the continuous freeze/thaw of water in the cracks of the rocks. This is an example of:

• ice wedging

• acid rain

• permeability

• abrasion

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

Rust that forms on rocks or metal because of extended exposure to oxygen is what example of chemical weathering?

• carbon dioxide (carbonic acid)

• acid rain

• oxidation

• lichens

Which of the following is the source of humus found in soil?

• bedrock

• B horizon

• parent rock

• plants and animals

Plants and animals are bad for soil

• true

• false

Which of the soil particles is the largest?

• sand

• silt

• clay

Wind blowing sand against other rock until it wears away the rock is an example of what process?

• Abrasion

• Chemical Weathering

• Erosion

• Oxidation