Download Name: - Mrs. Leachman Science

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Review Worksheet – Mechanical and Chemical Weathering
and Erosion
Directions: From the list below sort the Weathering Processes into the correct column depending on whether
each is an example of Mechanical (Physical) Weathering or Chemical Weathering.
Frost Action
Oxidation
Animal Activity
Acid rain
Abrasion (Exfoliation)
Water Dissolves Minerals in Rocks
Thermal (Heat) Expansion & Contraction
Root Wedging
Carbonation (Dissolution)
Hydrolysis
Human Activity
Hydration
Mechanical (Physical) Weathering
Chemical Weathering
Abrasion (exfoliation)
Animal activity
Thermal expansion (release of pressure)
Root wedging
Frost action
Human activity
Water dissolving mineral & rocks
Oxidation
Hydrolysis / Hydration
Carbonation
Acid rain
Directions: Complete each of the following short answers, using the terms found below.
Oxygen
Mineral Composition
Climate
Time
Iron
Water
1. Rust forms by oxygen
, iron
and water
Note: One of the forces is a gas, another is a mineral and one is a liquid.
2. The following forces(factors) can change the rate at which rocks weather: mineral composition
Time and climate
.
PDS/Earth Science and Honors Earth Science/December 11, 2009
interacting.
,
Directions: Fill in the blanks with the correct choice of word(s) from the 2 lists in the box below. Note: A
word may be used more than once.
chemical weathering
dry
hot
minerals
humid
surface area
water
cleavage
roots
fragments
cold
sun
1. The best conditions for chemical weathering to take place is a climate that is hot and
Humid
.(heat speeds up chemical reactions)
2. The best conditions for frost action to take place is a climate that is cold (ice) and
Humid (water)
.
d. Weathering by the actions of plants
Directions: Identify each statement below as a statement below as an example of Mechanical or Chemical
weathering. Write “M” for Mechanical or “C” for Chemical in the blank provided.
M
1. the wedging of tree roots along natural joints in granite
C
2. limestone dissolved by carbonic acid
C
3. the oxidation of minerals that contain iron
M
4. animal burrows dug in rock that let in water and air
M
5. repeated freezing and thawing of water that cracks rock
PDS/Earth Science and Honors Earth Science/December 11, 2009
C
6. the action of water, salt and air on car fenders
C
7. acids from plant roots that break up rocks
M
8. formation of potholes in streets during severe winters
M
9. raised sections of sidewalk along tree-lined streets
M
10. a small rock falling from a cliff
C
11. feldspar mixing with water and producing clay minerals
C
12. halite in rocks dissolving in water
C
13. decaying plants dissolving minerals in rocks
M
14. tree roots cracking the concrete foundation of a house
C
15. iron lawn furniture rusting outside
C
16. leaves decaying in the forest
PDS/Earth Science and Honors Earth Science/December 11, 2009