| Rock Cycle | Plate Tectonics and Boundaries | Layers of the Earth | Earthquakes and Faults | Volcanoes |
|---|---|---|---|---|
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What is the 2 types of weathering
Chemical and Physical
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What are the consequences of transform boundaries ?
Earthquakes and seismic activity due to rock stress.
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Which is the largest layer of the earth ?
Mantle being about 2900 km thick.
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What are the 4 types of seismic waves ?
Rayleigh, Love, Primary and Secondary waves.
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What is scale of volcanic eruption ?
VEI ( Volcanic Explosivity Index )
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What are the 3 main agents of erosion ?
Wind, Water and Gravity
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Name all the major 7 plates.
African Plate, Pacific Plate, Eurasian Plate, Indo-Australian Plate, North American Plate, South American Plate, Antarctic Plate.
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What is the inner core mainly made up of ?
It is said to have been made up of solid iron and nickel.
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What are the 2 scales to measure a an earthquake ?
Mercalli scale and Richter scale.
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What are the 4 types of volcanoes ?
Composite, Cinder Cone, Shield and Fissure.
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How are metamorphic rocks created ?
Metamorphic rocks are pushed into the crust over time and then are folded and molded due to high temperature and pressure.
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Why wasn’t Alfred Wegner at first supported or believe of his theory ?
He wasn’t able to find a force that could move here massive plates. The force was later identified by Harry Hess.
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Name all the layers of earth beginning from the core.
Inner core, Outer core, Mantle, Crust.
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What is a strike slip fault ?
A strike slip fault is wherein the 2 rock slabs slip parallely past one another.
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What is a tephra ?
Tephra is all the ash, rocks and rock fragments that are ejected into the air while volcanic eruptions.
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Name the landform that is formed as a result of silt deposition.
Delta
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What is the theory that was presented by Harry Hess ? Explain.
The sea floor spreading theory proposed by Harry Hess said that at MORs two plate spread apart due to the pressure of uprising magma from the mantle and form a ridge.
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Which layer of the earth is said to have been responsible for the earth’s magnetic field ?
It is the inner core. This is because of the high iron and nickel concentration.
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What is the hypo centre and where is it located ?
The hypo centre is basically the focus of the earthquake and it is below the ground.
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Why is a composite volcano called a composite volcano ?
It is because of the composite layers of pumice, ash and lava that have formed from multiple eruption over time forming he volcanoes sides.
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What is freeze thaw weathering ?
Freeze thaw weathering is when water seeps into cracks and then expands when it turns into ice expanding the cracks of the rocks.
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What are the consequences of oceanic - oceanic collisions ?
Island arcs, trenches and volcanoes.
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What is the MOHO ?
MOHO also known as the Mohorovicic Discontinuity is said to divide the crust and upper mantle.
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Name 3 differences in P waves and S waves.
P waves are longitudinal and S waves are transverse.
P waves travel faster over shorter distance whereas S waves travel slower over longer distances. P waves travel through so,ids, liquids and gases but S waves being slow can only travel through solids. S waves cause much more destruction than P waves because they have higher amplitude than P waves. |
How are Cinder Cone volcanoes formed ?
Cinder Cone volcanoes form when there is a young volcano which erupts explosively and releases cinders which later fall and pile up around the vents. This makes the volcanoes steep.
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