1. Name _____________________________________ Science 8
Unit 4: Weathering and Erosion
A. Weathering: is
_________________________________________________________________
For weathering to occur the rocks must be exposed to one or more of the following:
1. _________________________________________________________________
2. _________________________________________________________________
3. _________________________________________________________________
Evidence of Weathering:
The end product of the weathering of rocks is ______________________________.
Physical Weathering:
Rocks are broken into smaller pieces without changing the ______________________
nature of rock.
Explain how the following can cause physical weathering in the following ways:
* Freezing/thawing of water:
* Abrasion:
* Biologic activity:
* Human Actions:
If your increase surface area, you will _____________________
the rate of weathering.
Chemical Weathering:
Rocks are broken and the chemical composition is ______________________.

2. Examples of chemical weathering:
♦ Oxidation:
Occurs when _________________ from air combines with ____________________ to
form oxides.
Ex. _________________________________
♦ Carbonation:
Occurs when _________________containing ___________ acid dissolves minerals.
Ex. __________________________________
♦ Pollution:
Can speed up the rate of weathering. Oxides of ______________ & _______________
make rainwater unnaturally acidic.
Ex. __________________________________
♦ Hydration:
Occurs when ________________ such as mica and feldspar absorb _____________ and
weaken to form ______________________
Climate Affects Weathering:
Physical weathering dominates in ________________, _________________ climates
Chemical weathering dominates in ________________, _________________ climates
In general when there is more _______________________ there is more weathering.
Weathering Rates:
Rate of weathering also depends on:
______________________________________________________
______________________________________________________
Soil formation:
Soil is the combination of:
______________________, ________________________, ____________________
The end product of the weathering of rocks and biologic activity is_________________.

3. B. Erosion: is ________________________________________________ and
Depositing them elsewhere.
Erosion is driven by the force of **______________________________.
The agents of Erosion are:
 ____________________________________________
 ____________________________________________
 ____________________________________________
Each Agent of Erosion Produces it’s Own Characteristic Shape and Texture in the
sediment: Draw each one:
Running Water: _______________________________________
Glacial Ice: __________________________________________
Wind ______________________________________________
Gravity Fall:_________________________________________
* The primary agent of erosion ________________ __________________