Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

geo questions > tectonics > Flashcards

tectonics Flashcards

1
Q

what data presentation technique would show contrasting impact of a hazard event on different countries

A

choropleth map

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

describe the outer core

A

a liquid layer of 2200km in thickness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

which one of the earths layer has the highest density

A

inner core

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

state one primary impact of tectonic hazards

A

destruction of buildings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

two facts about the distribution of volcanoes

A
  • on the edge of plates = plate boundaries
  • volcanoes are locates along coasts
  • not evenly distributes
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

state two ways in which volcanic activities can endanger human life

A
  • can damage buildings
  • ash can damage aeroplane engines
  • landslides can damage property
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

name one landform often found on destructive plate boundaries

A

composite volcanoes

subduction zone

fold mountains

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

name one landform often found on destructive plate boundaries

A

composite volcanoes

subduction zone

fold mountains

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

outline why shield volcanoes form on divergent plate boundaries

A

convection currents cause the plates to move apart = basaltic lave is erupted through the fissure = travels a long distance before cooling to form a volcanoes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

explain one reason some earthquakes kill more people then others

A
  • population density
  • emergency service preparedness
  • nature of buildings
  • level of development
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

outline one difference between oceanic and continental crust

A

continental crust is thicker = oceanic thinner

continental more folded

relativste thickness of continual 50km oceanic as little as 0 km

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

explain one cause for the movement of tectonic plates

A

at convergent boundaries, gravity causes denser oceanic crust to subduct dragging the rest of the tectonic plate down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

suggest two reasons for the distribution of volcanoes

A

clusters of volcanoes near ISLAND CHAINS occur on convergent plate boundaries = caused by oceanic crust being subjected under

volcanoes in mid ocean locations are usually divergent plate boundary as the sea floor is spreading

no volcanoes in the middle of landmasses where there is no plate boundary = limits volcanic activity

mid ocean volcanoes due to hotspots = caused by mantle plumes where the oceanic crust is very thin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

explain one way people can predict volcanic activity

A

earthquakes = a seismometer = used to pick up vibrations in the earths crust = increase in vibrations may indicate an earthquake

eruptions = using thermal imaging techniques and satellite cameras = in order to track temp fluctuations in around the volcano = increase when an eruption is imminent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

explain one cause of a tsunami

A

caused by earthquakes = which is caused by plate boundaries = energy

caused by landslides = causes water to be displaced generating waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

describe one way a region affected by earthquakes can prepare for this hazard

A

evacuating population from danger zones

17
Q

suggest one reason why the number of deaths varies between earthquakes

A

emergency services are poorly equipped in some countries = making it difficult to access people under collapsed buildings

construction laws are less strict in some countries = leading to buildings that quickly collapse when tremors hit

18
Q

describe one action that can be taken to reduce the impact of earthquakes

A

authorities can provide an action plan = tell emergency services what to do in event of a earthquake

construction laws can be tightened = preventing buildings from collapsing

issue early warning systems = more evacuations = out of danger zone

19
Q

describe one way to reduce the impact of FUTURE earthquakes

A

new building laws introduced =. to ensure buildings are string enough to withstand earthquake

20
Q

describe how convection currents cause plate movements

A

in the mantle magma circulates in huge convection currents = these currents driven by heat of core = push the plates causing them to move

magma within the mantle is heated by radioactive decay = hot magma rises = pushes against the plates causing them to move

21
Q

describe the layer structure of the earths interior

A

lithosphere = crust

  • split into tectonic plates
  • oceanic and continental crust
  • least dense part of the planet

asthenosphere = mantle

  • partially molten
  • temp range from 1000-4000
  • made from peridotite
  • convection currents

core

  • mostly made up of iron and nickel
  • divided into solid inner and liquid outer core
  • densest part
  • hottest part = 4000-5000 degrees
22
Q

explain how volcanoes form on destructive plate boundaries

A
  • convection currents cause plates to collide
  • denser oceanic plate is pushed down into the mantle
  • melts
  • as the melted crust has a higher gaseous content magma rises up through crust
  • magma is viscous
  • forming a composite volcano
23
Q

explain why earthquakes occur on conservative plate boundaries

A
  • plates slide past each other
  • friction occurs
  • resulting in a build up of pressure
  • release of pressure results in a earthquake
  • epicentre/focus
  • eg. San Andreas
24
Q

explain why earthquakes happen on destructive plate margins

A

destructive margin where two plates collide - denser oceanic plate subducts - friction - pressure builds up and gives way - releases energy

25
Q

explain how building design can help reduce impact of a earthquake

A

steel rod foundations - prevent collapse

cross - bracing - stops floor collapsing + walls

dampers in a roof - reducing building sway

double glaze windows = stop glass breaking

shock absorbers built into frame and foundations

25
Q

explain how building design can help reduce impact of a earthquake

A

steel rod foundations - prevent collapse

cross - bracing - stops floor collapsing

dampers in a roof - reducing building sway

26
Q

describe how people can prepare for earthquakes

A
  • authorise action plans = tell emergency services what to do
  • construction laws tightened = ensuring all buildings have STEEL SUPPORTS = enable nehme to BEND rather than crumble when shaken
26
Q

describe how people can prepare for earthquakes

A
  • authorise action plans = tell emergency services what to do
  • construction laws tightened = ensuring all buildings have STEEL SUPPORTS = enable nehme to BEND rather than crumble when shaken
27
Q

explain why some earthquakes are more hazardous

A

depth of the focus can effect strength of the earthquake = a shallow focus leads to STRONGER shock waves

emergency services are poorly equipped in some countries = harder to reach people trapped under buildings = injured may not get medical care

28
Q

differences between oceanic and continental

A

oceanic = beneath sea vs continental = forms the land

continental crust thicker = 50km vs oceanic crust thinner = between 6-10km

continental crust has a lower density than oceanic

geo questions (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions