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The asthenosphere is:
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A layer of partially molten material within the upper part of the mantle
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The section of the Earth's crust upon which contact is established between the partially molten mantle and the tectonic plates
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An area within the mantle in which the lithospheric plates are sitting, made up of solid rock
Frage 2
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The majority of landform features associated with the Earth's internal forces are the result of large, spectacular movements constantly being repeated every few thousand years.
Frage 3
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Geomorphology is specifically the: (can select more than one)
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Study of landforms and their origin and evolution
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Study of distribution and form of rocks and minerals inside the Earth's crust
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Study of landforms and their distribution and form
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Study of the origin and evolution of rocks and minerals inside the Earth's crust
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Study of how the lithosphere was created, and how it reacts to mankind
Frage 4
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Radius of the core?
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34 000km
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340 000km
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340km
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3 400km
Frage 5
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The separation between the asthenosphere and the lithosphere is called the...
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Mohorovic Discontinuity
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Wegener Margin
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Wegener Discontinuity
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Mohorovic Margin
Frage 6
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Alfred Wegener began his theory of Continental Drift in 1915, but lacked scientific interest because it could not provide substantial evidence for a medium to which continents could move.
Frage 7
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Tectonic Plate motion is widely believed to be caused by:
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Convection currents in the mantle push the plates apart at diverging boundaries
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Convection currents in the mantle carry the plates in directions from within the asthenosphere
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Gravity pulls the plates towards the lowest point of altitude - the oceans - where they subduct or diverge and repeat the process
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Convection currents in the mantle pull plates into subduction margins where displacement forces the other plates to move in the direction
Frage 8
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Plates move at approximately ____ per year.
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1.5 - 7cm
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15 - 70cm
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1.5 - 7m
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15 - 70m
Frage 9
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Oceanic lithosphere (crust) is denser than continental lithosphere.
Frage 10
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An oceanic plate is the plate underneath all the areas of the various oceans.
Frage 11
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What plate boundary is shown in this image?
Frage 12
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Diverging plate boundaries can form:
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Mid-ocean ridges as new crust is formed from solidified molten material
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Mountain ranges as plates are pushed together, forcing crust upwards
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Subduction, as one plate pushes the other into the mantle
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Earthquakes as a single fault line releases the build-up of pressure along the plate
Frage 13
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Converging plate boundaries between oceanic and continental crust can form...
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Mid-ocean ridges as new crust is formed from solidified molten material
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Mountain ranges as plates are pushed together, forcing crust upwards
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Subduction, as one plate pushes the denser plate into the mantle
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Earthquakes as a single fault line releases the build-up of pressure along the plate
Frage 14
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A conservative margin between two plates can cause...
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Mid-ocean ridges as new crust is formed from solidified molten material
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Mountain ranges as plates are pushed together, forcing crust upwards
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Subduction, as one plate pushes the denser plate into the mantle
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Earthquakes as a single fault line releases the build-up of pressure along the plate
Frage 15
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These landforms/activities are examples of destructive margins: (can select more than one)
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Mount St Helens
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Monsterrat
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Iceland
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Mid-Atlantic Ridge
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Andes
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Himalayas
Frage 16
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Faults are fractures in a rock's structure.
Frage 17
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The focus is the area on the surface directly above the epicentre of the earthquake.
Frage 18
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What can be done to help prevent or worsen the impact of a tsunami?
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(This is an open ended question. It is here to make you answer this for yourself and think about it now) (This answer is correct)
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(This is an open ended question. It is here to make you answer this for yourself and think about it now) (This answer is incorrect)
Frage 19
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The area estimated to be affected by a volcanic eruption
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The buildup of material around a volcano creating a cone-like structure
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When a violent eruption blows off the top of an existing volcanic cone
Frage 20
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What results in gradation?
Frage 21
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Gradational processes work to smooth out the surface of the lithosphere.
Frage 22
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Which of these statements on gradational processes are correct?
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Exposed rock material is fragmented by weathering, detached by mass movements and agents of erosion, and then deposited at lower elevations as debris.
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Exposed rock material is fragmented by agents of erosion, detached by mass movement and weathering, and then deposited at lower elevations as debris.
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Exposed rock material is fragmented by deposition, detached by mass movements and weathering , and then eroded at lower elevations as debris.
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Exposed rock material is fragmented by mass movement, detached by weathering and agents of erosion, and then deposited at lower elevations as debris.
Frage 23
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Types of weathering: (can select more than one)
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Unloading
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Frost Action
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Glacial Ice
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Organic Action
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Running Water
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Winds
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Solutions
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Hydration
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Oxidation
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Organic Acids
Frage 24
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Mass movement is the movement of weathered particles through gravity.
Frage 25
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These are examples of mass movement: (can select more than one)
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Land slides
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Soil creep
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Running streams/water
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Earthquakes
Frage 26
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Agents of erosion are wind, running water, and gravity.
Frage 27
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Fluvial processes are the gradational process of erosion through running water.
Frage 28
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Running water is particularly effective for fluvial processes of erosion in... (can select more than one)
Frage 29
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Hydraulic action in fluvial processes is:
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The shearing force of the running water itself, exerting force and dragging on the river beds and banks
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Rock particles carried by the running water striking the channel walls
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Chemical solutions from rocks being exposed to solvents carried in the river
Frage 30
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Abrasion in fluvial processes is...
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The shearing force of the running water itself, exerting force and dragging on the river beds and banks
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Rock particles carried by the running water striking the channel walls
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Chemical solutions from rocks being exposed to solvents carried in the river
Frage 31
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Corrosion in fluvial processes is...
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The shearing force of the running water itself, exerting force and dragging on the river beds and banks
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Rock particles carried by the running water striking the channel walls
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Chemical solutions from rocks being exposed to solvents carried in the river
Frage 32
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A pyroclastic flow is a river of hot liquid, ash, mud and rock moving at very low speeds at temperatures of about 500°C
Frage 33
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Differential erosion is the process of softer rock in a plateau gradually being eroded away, leaving pillars of harder rock standing.