CHEMICAL WEATHERING CHANGES

CHEMICAL WEATHERING CHANGES

• A chemical reaction causes chemical change.
• Oxygen in the air and water reacts with metal to form rust
• CHEMICAL WEATHERING is the breakdown of rocks
• When the rocks chemically change it can make them look Different

DISSOLVING

• Water is the main cause of chemical weathering
• Some minerals dissolve in regular water
• After water falls down to earth it goes through soil and picks up carbon dioxide

RUSTING

• The oxygen in the air also involved in chemical weathering
• When these minerals dissolve in water oxygen in the air combines with iron to produce iron oxides or rust
• Iron oxides form a coating that colors the water and rocks coating on iron oxides

WEATHERING OCCORS AT DIFFERENT RATES

• Most weathering processes occur over hundreds of thousands of years.
• (These are some. Factors for weathering.Hudreds of thousands of years it Only wears
• Them down about the thickness of a fingernail.)

WEATHERING OCCURS AT DIFFERENT RATES

• (Surface area-the more of rocks surface that is exposed
• to the air and water the faster the rock will break down faster)
• Rock composition -Different rocks break down at Different rates.
• (Climate-water is needed for chemical weathering to happen
• and heats it up.However when it is freezing it is harder to break.)

DISSOLVING

• Air pollution can make water more acidic than natural
• These gases react with water vapor in the atmosphere to create acid rain
• Acid rain causes rocks to weather faster and break apart into smaller pieces

I GOT ALL MY INFO FROM TREFIL, JAMES S. "CHEMICAL WEATHERING CHANGE & WEATHERING OCCORS AT DIFFERENT RATES ."