GEOLOGY 1500 CHAPTER 6 EXAM
QUESTIONS WITH CORRECT
ANSWERS
Assume that water filling a crack in a rock undergoes cycles of freezing and melting.
Which of the following statement is true? - Answer- Water expands as it freezes,
causing the crack walls to be pushed apart.
Oxidation of iron is an important chemical weathering process for ferromagnesian
silicate minerals like olivine and biotite. - Answer- True
What mechanical weathering process produces talus slopes? - Answer- Frost wedging
Which of the following is/are most susceptible to chemical weathering by dissolution? -
Answer- Calcite
Sheeting fractures and exfoliation domes commonly develop in areas with highly
fractured bedrock. - Answer- True
Would you call the loose, unconsolidated, surface material on Mars regolith or soil? -
Answer- Regolith
Sheeting is mainly a process of mechanical weathering. - Answer- True
Which of the following is an important, mechanical weathering process for enlarging
fractures and extending them deeper into larger boulders and bedrock? - Answer- Frost
wedging
Ferromagnesium minerals (like olivine and pyroxene) that crystallize at high
temperature in Bowen's reaction series are generally much less susceptible to chemical
weathering than quartz. - Answer- False
Like most other liquids, water decreases in volume when it freezes. - Answer- False
Under similar warm, moist climatic conditions, why would basalt and gabbro generally
have higher chemical weathering rates than rhyolite and granite? - Answer- The
QUESTIONS WITH CORRECT
ANSWERS
Assume that water filling a crack in a rock undergoes cycles of freezing and melting.
Which of the following statement is true? - Answer- Water expands as it freezes,
causing the crack walls to be pushed apart.
Oxidation of iron is an important chemical weathering process for ferromagnesian
silicate minerals like olivine and biotite. - Answer- True
What mechanical weathering process produces talus slopes? - Answer- Frost wedging
Which of the following is/are most susceptible to chemical weathering by dissolution? -
Answer- Calcite
Sheeting fractures and exfoliation domes commonly develop in areas with highly
fractured bedrock. - Answer- True
Would you call the loose, unconsolidated, surface material on Mars regolith or soil? -
Answer- Regolith
Sheeting is mainly a process of mechanical weathering. - Answer- True
Which of the following is an important, mechanical weathering process for enlarging
fractures and extending them deeper into larger boulders and bedrock? - Answer- Frost
wedging
Ferromagnesium minerals (like olivine and pyroxene) that crystallize at high
temperature in Bowen's reaction series are generally much less susceptible to chemical
weathering than quartz. - Answer- False
Like most other liquids, water decreases in volume when it freezes. - Answer- False
Under similar warm, moist climatic conditions, why would basalt and gabbro generally
have higher chemical weathering rates than rhyolite and granite? - Answer- The
