Tectonic Hazards UNIT 1 SECTION A

?
What are the two types of crust?
Oceanic crust, continental crust
1 of 21
Describe the movement of plates at constructive plate margins and what happens
The plates move apart, new crust is formed as magma rises towards the surface.
2 of 21
Describe the movement of the plates at destructive plate margins and what happens
The plates move towards each other, the oceanic plate may sink beneath the continental plate. Gravity pulls the oceanic plate into the mantle, dragging the plate away from the constructive margin.
3 of 21
Describe the movement of the plates at the conservative margin
the plates slide alongside each other.
4 of 21
What kind of volcanoes occur on constructive plate margins?
Flat shield volcanoes
5 of 21
What kind of volcanoes occur on a destructive plate margin?
steep sided composite volcanoes
6 of 21
Why do people in poverty choose to live in areas at risk from tectonic hazards?
They have other things to think about: money, food, etc.
7 of 21
What benefits arise so that people choose to live in areas at risk from tectonic hazards?
fertile soils, rocks for building, minerals, hot water.
8 of 21
Why do people choose to live in areas at risk from tectonic hazards due to monitoring?
Effective warning systems allows people to receive warnings and evacuate before volcanoes occur
9 of 21
Name 4 management strategies that can reduce the risk from tectonic hazards
Monitoring, prediction, protection, planning
10 of 21
Define monitoring
using scientific equipment to detect warning signs of events
11 of 21
How do scientists monitor volcanoes?
Name 3 examples and explain.
Remote sensing: satellites detect heat and changes to the volcano's shape.

Geophysical measurements: detects changes in gravity as magma rises to surface.
.
Seismicity: seismographs record earthquakes.

Ground deformation: changes to the shape of the vol
12 of 21
How do scientists monitor earthquakes?
Give 1 example.
Ground deformation: changes to the shape of the earthquake are measured using laser beams.

There is no reliable ways discovered to monitor earthquakes.
13 of 21
Define prediction
Using historical evidence and monitoring, scientists can make predictions on where and when tectonic hazards may happen.
14 of 21
How do scientists predict earthquakes?
It's impossible for them to predict earthquakes as they are no clear warning signs, but historical evidence can be used at times.
15 of 21
Define protection
Designing buildings that will withstand tectonic hazards.
16 of 21
How does protection reduce the risk of volcanoes?
Give 1 example.
Earth embankments/explosives: divert lava flows away from property.
The power of a volcano means there is little to be done to protect people and buildings.
17 of 21
How does protection reduce the risk of earthquakes?
Give 2 examples.
Construct buildings that resist the ground shaking.
Tsunami walls protect important buildings.
18 of 21
Define planning.
Identifying and avoiding places most at risk.
19 of 21
How does planning reduce the risk of volcanoes?
Give 1 example.
Hazard maps: shows the likely areas to be affected.
20 of 21
How does planning reduce the risk of earthquakes?
Give 1 example.
Maps: shows the effects of an earthquake and identify those areas most at risk from damage.
21 of 21

Other cards in this set

Card 2

Front

Describe the movement of plates at constructive plate margins and what happens

Back

The plates move apart, new crust is formed as magma rises towards the surface.

Card 3

Front

Describe the movement of the plates at destructive plate margins and what happens

Back

Preview of the front of card 3

Card 4

Front

Describe the movement of the plates at the conservative margin

Back

Preview of the front of card 4

Card 5

Front

What kind of volcanoes occur on constructive plate margins?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Geography resources:

See all Geography resources »See all Tectonic Hazards resources »