Deck 1 - Tectonics distribution and plate boundaries Flashcards

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1
Q

What are two categories of tectonic hazard?

A

Seismic
Volcanic

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2
Q

Where do the majority of earthquakes occur?

A

The majority of earthquakes are found along plate boundaries. About 70% of all earthquakes are found in the ‘Ring of Fire’ in the Pacific Ocean

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3
Q

What is a intra-plate earthquake?

A

Intra-plate earthquakes occur in the middle of a tectonic plate

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4
Q

What secondary hazards are associated with earthquakes?

A

Landslides, avalanches, tsunamis

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5
Q

Where are the majority of volcanoes found?

A

There are about 500 active volcanoes around the world with on average 50 erupting each year. The majority are found on plate boundaries with a large concentration around the Pacific Ocean (Ring of Fire

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6
Q

What is a hot spot volcano?

A

An intra-plate volcano that is located above a mantle plume

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7
Q

What is a constructive (divergent) plate margin?

A

A plate boundary where tectonic plates are moving away from each other allowing for magma to move to the surface to create new land

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8
Q

What is a destructive (convergent) plate margin?

A

A plate margin where tectonic plates are moving towards each other. Oceanic plate is denser than continental plate meaning it is subducted

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9
Q

What is a conservative plate margin?

A

A plate margin where tectonic plates move alongside each other. Plates are either moving in opposite direction or the same direction at different speeds

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10
Q

What is a collision boundary?

A

A destructive margin where both plates are of equal density meaning that neither plate subducts resulting in an upwards buckling creating fold mountains such as the Himalayas.

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11
Q

Which type of plate boundaries do you find earthquakes at?

A

All

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12
Q

Which type of plate boundary do you find volcanoes at?

A

Constructive and destructive

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