L.O: S.W.B.A.T: explain chemical weathering (copy everything in blue) 1

Why does Lady Liberty look different at the 3 time periods?

Chemical WeatheringChemical – A set of processes that break a rock into smaller pieces by

_______________________________________________________ of the rock. Does _____

look ___________ the original rock.

Why does iron get rusty?

Oxidation: when _________________ in the air reacts with _________________ in rocks

forming _______________________ (oxides)

L.O: S.W.B.A.T: explain chemical weathering (copy everything in blue) 2

Carbonation: rainfall is slightly ___________________ and in more polluted regions of the world (like NY), it’s even more acidic. When acid rain comes in contact with calcite-containing

rocks like limestone, it can ____________________________ the rock substantially.

*Acid rain slowly “______________________” anything made of _____________________

This is why we often see old tombstones that are unreadable

The action of carbonation results in the formation of underground caves and sinkholes

L.O: S.W.B.A.T: explain chemical weathering (copy everything in blue) 3

Hydration: __________________________________ the minerals in rocks, weakening them.

*the _______________________________________ affects how fast weathering happens!

in ________________________________ (wet) climates, __________________ weathering dominates

*In ___________________ climates, __________________________ weathering is dominant.

L.O: S.W.B.A.T: explain chemical weathering (copy everything in blue) 4

wetter climates = faster weathering *Drier climates = slower weathering.

Larger rocks = slower weathering smaller rocks = faster weathering

Which environment would show the greatest rate of weathering? Why?

Which rocks would weather faster? Why?

Rain forest? Desert?

diamond Halite (table salt)

L.O: S.W.B.A.T: explain chemical weathering (copy everything in blue) 5

Which rocks would weather faster if you put them in water and shook them? Why?

Soil Formation• Soil – A _______________ of rock particles, minerals, water, gasses and the remains of

living things.

• The characteristics of soil depend on the ______________________ rock. (original rock before weathering).

• Soil formed directly over the parent rock is called ____________________________

• Soil formed with rock material from a different location is called

________________________

* Both _____________ and ___________________________ activity (activity of living

things) are needed for to ______________________________________.

Angular rocks? Rounded rocks?

L.O: S.W.B.A.T: explain chemical weathering (copy everything in blue) 6

The Soil is affected by its ____________________________

____________ climates = _______________ soils

_______________________ climates = ______________________ soils

soil profile: the distinct vertical ___________________________ of soil

L.O: S.W.B.A.T: explain chemical weathering (copy everything in blue) 7

Soil Horizons

horizon (the topsoil) horizon horizon

horizonBed rock

L.O: S.W.B.A.T: explain chemical weathering (copy everything in blue) 8

A Horizon – Top soil ________________________ material and small rock particles

A ____________________________ living in soil are almost always in A horizon

Humus – ________________________ remains of once living organisms (mostly plants)

B Horizon – consists of __________________________rock particles, some decaying remains and minerals.

C Horizon – _________________________________ weather bedrock.

____________________________ – When rain water carries minerals from horizon A into horizon B

_____________________________ things ultimately need the soil to live. even humans!

L.O: S.W.B.A.T: explain chemical weathering (copy everything in blue) 9

Think, pair, share: Why should humans care about soil?