Want to make creations as awesome as this one?

Transcript

Chemical Weathering

GenialPresentation

I’m an awesome subtitle, ideal for giving more context about the topic at hand
Carbonation
Dissolution
Hydrolysis
Oxidation
Types of Chemical Weathering
A breakdown of rock where atoms are rearranged and form different compounds

Def of Chemical Weathering

Statue of Liberty
Oxidation happens when oxygen combines chemically with minerals such as iron. The iron in your bike reacts with oxygen to create rust. Many rocks with iron in them are red in color. A prie example is Ayers Rock in Australia.

Oxidation

Go Back
Water chemically bonds with minerals in the rocks and produces a new material or rock. For example feldspar when mixed with water will turn into clay. This process tends to be improtant contributor to soil.

Hydrolysis

Go Back
Occurs when rocks of minerals dissolve in water. Halite (NaCl) and gypsum both dissolve very easily in water.

Dissolution

Go Back
Acids are ranked from 1 to 14 where anything below a 7 is an acid and anything above a 7 is a base. Examples:Lemon juice - acidMilk - base7 - Water
This tends to occur in rocks like limestone and marble that have calcite in them.
This occurs when water mixes with carbon dioxide in the atmosphere and forms carbonic acid. This week acid can break down and dissolve some minerals in rocks.

Carbonation

Go Back
HumansPollutants in the air from buses and cars and factories mix with the atmosphere and create acid rain which in turn affects the rocks it touches.
OrganismsTiny organisms, like lichen, can release acids and toxins that react with the minerals changing their make up.
Water and AirThese can chemically alter minerals and cause them to change like iron to rust.
There are 3 agents of chemical weathering. There is water and air, organisms, and humans.

Agents of Chemical Weathering

Erosion, Weathering and Deposition Song

Back

Grows from the celing downwards
Grows from the ground upwards
Crystal Cave
Stalactite
Stalagmite

Difference between stalagmite and stalactite

NEXT PAGE

Rocks that have minerals in them that are prone to dissolution leave holes behind making it easier for chemical and mechanical weathering to occur. Rocks with iron are prone to oxidation and those rocks that are weaker, like sandstone or shale, break easily thru mechanical weathering and are exposed for chemical weathering.

Exposure
Type of Rock

Factors that Affect the Speed of Chemical Weathering

BACK

Rocks in warm, wet climates have more chemical weathering due to the moistrue in the air. They also have more weathering from plants as well.

Rocks in dry, warm climates, like out west, have more mechanical weathering due to heat and wind.

Climate & Air Quality

Can you escapaaa?

TOMORROWFarm Weathering Escape Room