Landscape that is unique stion on the last page.
th Romero
Use the word bank to fill in the paragraph.
Chemical Moisture Frost wedging Cracks Temperatures Rust
Freezing Minerals
Mechanical Pieces Plants Acid Climate Water
Weathering is the breaking of rocks into
There are two main types of weathering
weathering involves breaking rocks without changing their chemical composition. In
_water trapped in rocks freezes and expands, forcing the rocks apart.
can also cause mechanical weathering. Plant roots put pressure in rocks and cause small
to widen and split the rock,
weathering involves water, air and
other substances to react with the minerals in rocks. When metal is exposed to water and oxygen, oxidation
occurs and
forms. Carbonic acid in plant roots and mosses also react with the
in
rocks. Water and carbon dioxide form
which deteriorates many stones. How rapidly these
changes occur depend on the
of the area. Chemical weathering happens more slowly in the
desert because there is little
Low
in polar regions cause more
physical weathering. Whenever
and thawing alternate, mechanical weathering becomes
on the roadways.
very detrimental forming many
Pro