Earth's Structure & plates

Question 1

How old is earth

Answer 1

4.5 billion years old

Question 2

4 structures in interior

Answer 2

Earthquakes, Volcanos, tectonic plates, Tectonic motion

Question 3

Inner core

Answer 3

made from nickel and iron, 5000 degress, Solid and is hotter than the sun

Question 4

Mantle

Answer 4

75% melted rock, Asthenosphere, Convention currents

Question 5

Crust

Answer 5

10-70km,

Question 6

Continental crust

Answer 6

Granite and andersite, light coloured, low density, Silica and aluminium, Older, Thicker

Question 7

Oceanic crust

Answer 7

Basalt, Dark, Dense, Silica and magnesium, younger, Thinner

Question 8

Continental drift

Answer 8

Theory that the earth is divided into tectonic plates that float on the mantle

Question 9

Continental drift movements

Answer 9

Crash into, Pull apart, Rub off eachother

Question 10

Continental drift features

Answer 10

Oceanic trenches, fold mountains, earthquakes

Question 11

How many tectonic plates are there

Answer 11

7

Question 12

What do tectonic plates move on

Answer 12

Thermal convection currents

Question 13

Where does hot magma from the core rise to

Answer 13

Asthenosphere

Question 14

Where are younger rocks found

Answer 14

plate boundaries

Question 15

Where are older rocks found

Answer 15

Ocean edges

Question 16

What was the original continent called

Answer 16

Pangaea

Question 17

What is continental drift

Answer 17

Theory that the earths crust is divided up into tectonic plates that float on the mantle

Question 18

What do plates move on

Answer 18

Thermal convection currents

Question 19

Give 3 examples that prove the theory of Continental drift

Answer 19

Fossils, matching rocks and matching edges of continents

Question 20

What is a divergent or constructive plate boundary

Answer 20

Plates that separate

Question 21

What is a convergent or destructive plate boundary

Answer 21

Plates that collide

Question 22

What is a transform plate boundary

Answer 22

Plates that slide of one another

Question 23

Give a process of constructive plate boundary

Answer 23

Sea floor spreading, rifting

Question 24

Give a process of destructive plate boundary

Answer 24

Subduction

Question 25

Give a feature and location of sea floor spreading

Answer 25

Mid ocean ridge, Atlantic Ridge

Question 26

Give a feature and location of subduction

Answer 26

Island arc, Japan

Question 27

Give a feature and location of Transforming plate boundaries

Answer 27

Fault line, San Andreas

Question 28

Give 2 examples of why we know Ireland has been ‘on the move’

Answer 28

Variety of rocks, Crust welded