Show:
Earthquakes
Earthquake Hazards
Volcanoes
Volcanoes Hazards
100

The hypocentre is also known as the....


the Focus!

100

True or false: 

Tsunamis are a primary impact/hazard of earthquakes


False!! though it may seem like it, Tsunamis are in fact secondary impacts

100

What is a Dormant volcano?


A volcano that has not erupted for many years, but has potential (e.g Mt. Pinatubo erupted in 1991 after 500 years of dormancy)


100

What is the name of the substance that comes from the mantle and is stored in a volcano?



Magma! not Lava you idiot

200

At which plate boundaries do Earthquakes MOSTLYY OCCUR AT? 

Hint: Friction


Destructive, Conservative and Collision! 


200

What is Liquefaction??


Liquefaction is when soil or sand loses its stiffness and strength, in which it temporarily almost takes form of a liquid and allows things to be "swallowed" by the ground due to rapid and strong shaking of the ground.

200

Which types of plate boundaries do not form volcanoes?


Collision Plate boundary and Conservative Plate boundaries

200

What is a Lahar? 


A river of mud and ash caused by rainfall

300

What is a seismometer?


A seismometer detects vibrations caused by an earthquake. It plots these vibrations on a seismograph

300

Name two way we can predict an Earthquake


- use seismographs to measure increasing amount of tremors

- study previous earthquakes (similar patterns)

- strange animal behaviour (though it works, can be kinda sketchy in terms or reliability)

- Laser beams: highly accurate recording of minor movement of the earth's crust.

- Radon Gas: escapes from crust and can be measured, early sign of possible earthquake.

300

From which part of the volcano, does lava travel through to reach the crater? 


The Main Vent ! 

400

In terms of time of day, how do Earthquake impacts differ?


Earthquakes at night create more hazards such as loss of vision. Earthquakes at night could also be safer as density of people outside are lower. 

400

Name 2 ways a building can mitigate the impacts of an Earthquake on itself.


- Flexible steel frames that sway as the ground moves

- cross bracing in the framing of the building

- shutters to cover windows that may shadow

- rubberised foundation to absorb the shaking

- counter weights at the top of the building to prevent the building from toppling

- deep foundation to keep the building planted in the ground.


400

What type of lava does a composite volcano create?


Andesitic/Viscous Lava

500

Name a secondary impact of an Earthquake and elaborate why it affects the country/place in the long run.

- Debt due to high reparations

- unemployment

- contaminated water supply

- Tsunamis

500

What are ways to prepare and prevent for an Earthquake? 


- Earthquake proof buildings

- Train population (National Earthquake Awareness Day)

- Train and organise emergency sevices

- Set up warning systems

- Have an emergency plan

500

Name 3 characteristics of the lava found in a shield volcano.


Low Viscosity, runny, Low silica content, High temperature, low gas content