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Flashcards in geography tectonic hazards Deck (20)
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1

what is the crust made from

solid rock

2

what is the mantle made from

mainly magnesium and some iron

3

what is the outer core made from

a liquid layer made of Iron and nickel

4

what is the inner core made from

a solid layer made of Iron and nickel

5

how thick is the crust

0 - 60 km thick

6

how thick is the mantle

2900 km thick

7

how thick is the outer core

2200 km thick

8

how thick is the inner core

1220 km thick

9

temperature of the mantle

500 - 900 °C

10

temperature of the outer core

4400 °C

11

temperature of the inner core

5430 °C

12

what is continental crust made from

mainly granite

13

what is the oceanic made from

mainly basalt

14

how thick is the oceanic crust

5 - 10 km thick

15

how thick is the continental crust

25 - 100 km thick

16

upper mantle state

solid

17

lower mantle state

soft and plastic - can flow

18

extinct volcano

highly unlikely to erupt again

19

dormant volcano

hasn't erupted for 2000 years but could erupt again

20

active volcano

erupted recently likely to erupt again