Plate tectonics

Question 1

Crust

Answer 1

Rocky, brittle outer layer, earths surface

Question 2

Mantle

Answer 2

thick, middle layer, made of magnesium and iron silicate, tar like, flows like silly putty

Question 3

inner core

Answer 3

dense metallic center, made of iron and nickel, all of the pressure is on it.

Question 4

outer core

Answer 4

liquid, very hot.

Question 5

Asthenosphere

Answer 5

upper mantle, hot and soft, plasticy, flows like thick liquid

Question 6

Continental Drift

Answer 6

All of the contients were once connected because they have lots of clues that point towards it

Question 7

Mid-ocean ridge

Answer 7

long, tall mountain range in the ocean where 2 plates diverge

Question 8

Seafloor spreading

Answer 8

rocks get older farther away from the mid-ocean ridge, magma/rock comes out of the mid-ocean ridge

Question 9

normal polarity

Answer 9

geographic north is magnetic north

Question 10

reversed polarity

Answer 10

geographic south is magnetic north

Question 11

magnetic reversal

Answer 11

when the magnetic north and south switches

Question 12

plate tectonics

Answer 12

The movement of Earth’s plates to form different landforms and dramatically changes itself.

Question 13

lithosphere

Answer 13

crust and uppermost mantle, similar kind and physical state as rocks, forms tectonic plates.

Question 14

Divergent plate boundary

Answer 14

pull away from each other.new crust is generated. forms. mid-ocean ridges and rift valleys.

Question 15

Convergent plate boundary

Answer 15

where crust comes together. creates subduction Mariana trench, mountains, volcanoes

Question 16

transform plate boundary

Answer 16

Crust slides horizontally past each other. creates fault zones and faults.

Question 17

subduction

Answer 17

One plate slides under the other to create a trench.

Question 18

convection

Answer 18

the mantle creating plate tectonics

Question 19

ridge push

Answer 19

rising magma at the mid-ocean ridge

Question 20

slab pull

Answer 20

during subduction, one plate sinks under another slab of crust

Question 21

basal drag

Answer 21

the movement of magma under the crust that causes everything to be pushed along like a conveyor belt

Question 22

Alfred Wegener

Answer 22

developed the hypothesis of Continental drift