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WorksheetsModule 4 - Metamorphism
Total questions: 15
Worksheet time: 8mins
What causes changes in the composition of a rock during the process of metamorphism?
increase in pressure
increase in temperature
reaction with hydrothermal fluids
All of these.
Which of the following is the process exhibited by parallel alignment of mica in a metamorphic rock?
metasomatism
bedding
porphyroblasts
foliation
What type of metamorphic rock will form if a mudrock experiences high-grade metamorphism?
Gneiss
Phyllite
Schist
Slate
Which of the following statements about the metamorphism of limestone is FALSE?
With increasing metamorphism, the calcite minerals form a larger crystal.
With increasing metamorphism, the amount of water decreases.
With increasing metamorphism, the grain size of the minerals gets smaller.
With increasing metamorphism, foliation develops.
Which of the following is TRUE about contact metamorphism?
It is prominent in areas where surrounding rocks are exposed to heat coming from magma intrusion.
It takes place when heat and shock waves are formed from meteor or asteroid impact.
Pressure has an important role in the transformation of rocks in contact metamorphism.
It occurs within the continental crust.
Which of the following transformations is directly related to pressure in producing metamorphic rocks?
formation of foliation
change mineralogical in the rock
the increasing size of mineral crystals
change in mineral composition of the rock
Which of the following metamorphic rocks would NOT come from mudrock?
Marble
Slate
Gneiss
Schist
What process contributes to the metamorphism of oceanic crust at the zone of spreading ridge?
Dissolved minerals in the water confined within the rocks react with the heat and trigger a chemical reaction.
Minerals present in the ocean water percolate through the rocks and become deposited within the rocks while replacing other minerals.
The heat coming out from hydrothermal vents under the ocean heats the rock which leads to recrystallization of the original mineral content of the rock.
Interaction of plates below the spreading oceanic crust creates horizontal movements and deforms the rocks within leading to formations of foliations and cracks.
Rigel argued with his classmates that the rock that he found in the campsite near the foot of the Taal volcano was a metamorphic rock. Others claimed that it was a volcanic rock because it was found near a volcano hence, an igneous rock. What features of the rock would have convinced Rigel that it was a metamorphic rock and not an igneous rock?
The minerals in rocks are almost invisible to be seen.
The rock contains bits of old shells of snails and wood.
The surface of the rock has holes similar to Swiss cheese.
The rock contains interlocking and large crystals of minerals compared to minerals found in igneous rocks.
Diamonds are minerals made through a process like metamorphism which results in a very dense arrangement of carbon atoms. What type of metamorphism would create a diamond?
Contact metamorphism
Burial metamorphism
Shock metamorphism
High-pressure metamorphism
Which of the following metamorphic rocks may have come from a shale?
All of the above.
schist
phyllite
gneiss
In which geographic area will there be a metamorphic rock with very distinct foliations?
near magma intrusion
at the core of the Himalayas
in the mid-ocean ridge in the Atlantic Ocean
in convergent boundaries where plates move towards each other
Low-grade metamorphism takes place at temperatures between 200°C to 320°C, and at relatively low pressure. Which metamorphic rock is created in this environmental setting?
Slate
Gneiss
Hornfels
Schist
How does the presence of a hot pluton contribute to metasomatism?
A hot pluton heats the surrounding water, causing groundwater to circulate around the rocks.
The heat coming from the pluton heats up the rock and triggers the recrystallization of its original minerals.
Interaction of plates below the spreading oceanic crust creates horizontal movements and deforms the rocks within leading to formations of foliations and cracks.
Magma within the pluton cooks up the minerals and destroys its original crystal arrangements.
How does metasomatism occur?
Minerals recrystallize and realign through regional metamorphism due to heat and pressure.
The arrangement of original minerals is destroyed by the impact due to asteroid bombardment.
The dissolved minerals in the fluids react with rocks that the fluids penetrate causing changes in chemical and mineral compositions.
Minerals recrystallize through contact metamorphism due to heat.
