Download Sheet 11-1 Weathering

Geology 12
Name: ___________________________
Block: _________
Activity 11-1 Weathering
Fill in the Blanks:
1.
The physical breakdown and chemical alteration of rocks and minerals on the
surface of the Earth is called _________________.
2.
The removal of weathered material is called _________________.
3.
Two types of weathering are _________________ and _________________
weathering.
4.
The repeated freezing and thawing of water in cracks of rock produces
_________________ wedging.
5.
Exfoliation domes are due to a release in _________________ because overlying
rocks have been _________________ away.
6.
Common chemical weathering reactions include ions going into
_________________, iron-bearing minerals being _________________, and
feldspars undergoing _________________.
7.
Hydrolysis reactions on feldspar produces _________________.
8.
_________________ size particles chemically weather fastest.
9.
Initially rectangular blocks of rock subjected to chemical weathering tend to
become more _________________ as weathering proceeds.
10.
The early-formed minerals of Bowen’s reaction series weather
_________________ than the later formed minerals.
True/False Plus:
11. _____
Indicate if the statement is true or false. If it is false, change the
underlined part(s) to make it true.
Erosion is the physical and chemical breakdown of rocks.
12. _____ Exfoliation may produce large rounded domes of rock in mountainous areas.
13. _____ The freezing and thawing of water is important for chemical weathering.
14. _____ Plants and animals can bring about mechanical weathering.
15. _____ Water is an essential ingredient in chemical weathering.
16. _____ Felsic igneous rocks tend to weather faster than mafic rocks.
17. _____ The red colour in many soils is the result of the oxidation of aluminum.
18. _____ Most clay minerals result from the hydrolysis of calcite.
19. _____ As the particle size decreases, the rate of chemical weathering increases.
20. _____ Quartz is the most resistant of the common rock forming minerals.
21. _____ Spheroidal weathering occurs because the flat faces of a rectangular block
of rock weather slower than the corners.
22. _____ Weathering is a way that minerals become more stable under surface
conditions.
Short Answers:
23.
Name or describe two examples
of mechanical weathering that
are occurring in the picture to
the right.
24.
Describe a climatic condition that would promote chemical weathering. What
characteristics of the rock itself promote chemical weathering?
25.
How does Bowen’s reaction series predict susceptibility of minerals to chemical
weathering?