Page 118 - Science Course 2 (Book 2)
P. 118
Mo10-L5: Key Concept Check
Direction: On the line before each description, write P if the description is an example of physical
weathering or C if the description is an example of chemical weathering.
1. Calcite in limestone dissolves in slightly acidic rainwater.
2. The roots of plants grow into the cracks in rocks.
3. A boulder rolls off a cliff and breaks apart.
4. Iron in rocks reacts with oxygen to form iron oxide.
5. Carbon dioxide reacts with feldspar to form clay.
6. Water seeps into cracks in rocks and freezes and thaws.
7. Faults rupture and cause rocks to break.
Direction: Answer each question or respond to each statement on the lines provided
8. What is weathering?
9. Compare physical weathering and chemical weathering.
10. Give an example of a factor that can affect rates of weathering.
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