AQA A2 Geography; Unit 1; Plate Tectonics.

HideShow resource information
Constructive Margins are also called?
Divergent
1 of 27
Oceanic ridges have a total length across the planet of?
60,000km
2 of 27
Hot Spots aound the core of the Earth generate what?
Convection Currents (within the mantle)
3 of 27
What is the name of the most commonly studied example of a Rift Valley?
East African Rift Valley (EAR)
4 of 27
How far does the Rift Valley that you have studied extend, and from where to where?
4,000km, from Mozambique to the Red Sea
5 of 27
Which feature is associated with the Rift Valley that you have studied? (Not the name of the Rift itself, but the feature associated)
Mount Kilimanjaro
6 of 27
During Oceanic/Continental Convergence at a Destructive plate margin, what process occurs?
Subduction.
7 of 27
The downwarping of the ocanic plate under the continental plate causes what to form?
Deep Oceanic Trenches.
8 of 27
Where is a large area in the UK where exposed batholiths are found?
Dartmoor, Devon.
9 of 27
What forms Basaltic lava?
Magma that is low in silica.
10 of 27
Andesitic and Rhyolitic lavas are formed from?
Silica Rich Acid Magma that is very viscous.
11 of 27
The main types of extrusive volcanic landforms are?
Lava Plateauxs, Basic/Shield Volcanoes, Acid/Dome Volcanoes, Ash and Cinder Cones, Composite Cones and Calderas.
12 of 27
What are Dykes?
Dykes are vertical intrusions with horizontal cooling cracks.
13 of 27
What are Sills?
Sills are horizontal intrusions along the lines of bedding planes.
14 of 27
What are sills and dykes both commonly made of?
Dolerite.
15 of 27
What are the minor volcanic forms?
Solfatara, Geysers and Hot Springs/Boiling mud.
16 of 27
What is Tephra?
Tephra is solid material of varying grain size, from volcanic bombs to ash particles, ejected into the atmosphere.
17 of 27
Pyroclastic flows have a temperature of?
800 degrees centigrade.
18 of 27
What are Pyroclastic Flows?
They are gas charged, high velocity flows made up of a mixture of gases and tephra.
19 of 27
What are the major volcanic gases?
Carbon Dioxide, Carbon Monoxide, Hydrogen Sulphide, Sulphur Dioxide and Chlorine.
20 of 27
Secondary effects of volcanic activity are?
Lahars, Flooding, Tsunamis, Volcanic Landslides and Climatic change.
21 of 27
What is classed as a shallow focus for an earthquake?
0-70km deep.
22 of 27
What is classed as an intermediate focus for an earthquake?
70-300km deep.
23 of 27
What is classed as a deep focus for an earthquake?
300-700km deep.
24 of 27
What is the difference between Primary (P) waves and Secondary (S) waves? (Seismicity)
(P) waves travel fastest and vibrate in the direction in which they are travelling. (S) waves travel at half the speed of (P) waves and shear rock by vibrating at right angles to the direction of travel.
25 of 27
What are (L) waves? (Seismicity)
(L) waves are surface waves that travel slowest and near to the ground surface. Some surface waves shake the ground at right angles to the direction of wave movement and some have a rolling motion that produces vertical ground movement.
26 of 27
Secondary Effects Of Earthquakes Are?
Soil Liquefaction, Landslides/Avalanches, Effects on People and the built environment, Tsunamis.
27 of 27

Other cards in this set

Card 2

Front

Oceanic ridges have a total length across the planet of?

Back

60,000km

Card 3

Front

Hot Spots aound the core of the Earth generate what?

Back

Preview of the front of card 3

Card 4

Front

What is the name of the most commonly studied example of a Rift Valley?

Back

Preview of the front of card 4

Card 5

Front

How far does the Rift Valley that you have studied extend, and from where to where?

Back

Preview of the front of card 5
View more cards

Comments

TGCFashion

I'm always adding to this resource, so new things are always being added.

Similar Geography resources:

See all Geography resources »See all Plate tectonics resources »