Use the word bank to fill in the paragraph. Minerals
Chemical Moisture Frost wedging Cracks
Freezing
Temperatures
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 messes also react with the
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
in polar regions cause more
physical weathering. Whenever
and thawing alternate, mechanical weathering becomes
very detrimental forming many
on the roadways.
Low

Nitrate poisoning for the first onebaby blue syndrome

Dthrough a slow process

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.