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Geography Upper Sec > Chap 1 - Gateway 1 > Flashcards

Chap 1 - Gateway 1 Flashcards

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1
Q

What is a natural hazard?

A

It is a naturally occurring event that threatens human lives and causes damage to property

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2
Q

Natural hazards can be categorized as

A

Tectonic

Climate-related

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3
Q

Examples of Tectonic natural hazards

A

Earthquakes

Volcanic eruptions

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4
Q

Examples of Climate-related natural hazards

A

Floods
Storms
Droughts
Tropical cylcones

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5
Q

Tectonic hazards occur mostly at

A

Coastlines of the Pacific Ocean

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6
Q

What is the internal structure of the earth?

A

Core
Mantle
Crust

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7
Q

What is the characteristics of the Core?

A

Centre of the earth with radius of 3500 km
Composed of mostly iron and nickel
Temperature between 3000 and 5000 degree Celsius
Divided into liquid outer core and solid inner core

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8
Q

What is the characteristic of the Mantle?

A

Mostly solid rock
2900 km thick
Temperature between 800 and 3000 degree Celsius

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9
Q

What is the characteristic of the Crust?

A

Mostly Basalt and granite rock

A few km to more 70 km thick

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10
Q

What is the lithosphere?

A

It consist of the crust and outermost mantle.

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11
Q

How is magma cormed

A

When rocks in the lithosphere melt

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12
Q

What are tectonic plates?

A

They are part of the crust that move in relation to one another

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13
Q

Tectonic plates can be classified as

A

Oceanic crust

Continental crust

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14
Q

What are Oceanic crust characteristics?

A

Beneath deep oceans
Between 5 km and 8 kn thick
Mostly Basalt Rocks that are less than 200 million years old

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15
Q

Plate boundaries can be categorised as

A

Divergent
Convergent
Transform

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16
Q

Plate boundaries that move away from each other

A

Divergent

17
Q

Plate boundaries that move towards each other

A

Convergent

18
Q

Plate boundaries that move past each other

A

Transform

19
Q

What is the associated landform with Divergent Oceanic-Oceanic plate boundaries

A

mid-ocean ridge

20
Q

What is the associated landform with Divergent Continental-Continental plate boundaries

A

Rift valley

21
Q

What is the associated landform with Convergent Oceanic-Oceanic plate boundaries

A

Oceanic trench

22
Q

What is the associated landform with Convergent Continental-Continental plate boundaries

A

Fold mountains

23
Q

What is the associated landform with Convergent Oceanic-Continental plate boundaries

A

Oceanic trench and Fold mountains

Geography Upper Sec (3 decks)

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