Weathering Review

A metal statue slowly turning green after years of being outside is an example of:

• mechanical weathering
• chemical weathering

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

• frost wedging
• acid rain
• permeability
• abrasion

Caves are most likely to form from the chemical weathering of which kind of rock?

• Granite
• Limestone
• Basalt
• Sandstone

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.

Oxidation forms ______________

• Water

• Plants

• Rust

• Ice

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

• mechanical weathering
• chemical weathering
• erosion weathering
• deposition

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.

How is mechanical weathering different from chemical weathering?

• Chemical weathering happens over much shorter time frame than mechanical weathering.
• Chemical weathering changes the chemical composition of rocks; mechanical weathering does not.
• Chemical weathering occurs only in tropical climates; mechanical weathering occurs only in cool climates.
• Chemical weathering occurs only in the mountains; mechanical weathering occurs only on flat land.

How do plants weather rocks?

• During photosynthesis
• When roots grow into cracks of rocks and expand the rock breaks.
• When the plant moves water from the roots to the leaves, the rock breaks.
• Plants don't weather rocks.

Which of the following is an example of a process that causes mechanical weathering of rocks?

• crystallization
• freezing and thawing
• sedimentation
• condensing and sublimating