Vocab 1 And 6 Vocab

Front 1

Crust

Back 1

solid, thin outer layer of Earth

Front 2

Mantle

Back 2

Thick layer of Earth below the crust.

Front 3

Core

Back 3

Innermost region of Earth

Front 4

Continental drift

Back 4

theory that the continents were at one or more times a singlw landmass that broke apart and eventually moved into the positions they are in today

Front 5

Pangaea

Back 5

single,giant landmass, or continent, that later broke apart

Front 6

mid-ocean ridge

Back 6

Ocean-floor feature resembling a mountain ridge on land.

Front 7

Rift valley

Back 7

flat area between two ridges that is formed by spreading plates

Front 8

Seafloor spreading

Back 8

process that form new seafloor

Front 9

Trench

Back 9

deep canyon

Front 10

subduction

Back 10

Place where old oceanic crust is forced back down into an ocean trench.

Front 11

Tectonic plates

Back 11

large,solid piece of Earth's surface

Front 12

Theory of Plate Tectonics

Back 12

theory that Earth's crust is broken into plates that float on th eupper part of the mantle

Front 13

Convection current

Back 13

movement of a gas or a liquid caused by changes in temperature

Front 14

Plate boundary

Back 14

place where two plates

Front 15

Magma chamber

Back 15

underground pocket of molten rock

Front 16

Hot Spot

Back 16

Place where magma reaches the surface of a tectonic plate.

Front 17

Word

Back 17

Definition

Hint 17

Use Word in Sentence

Front 18

Crust

Back 18

solid, thin outer layer of Earth

Hint 18

It forms the upper lithosphere

Front 19

Mantle

Back 19

Thick layer of Earth below the crust.

Hint 19

Earth's mantle range from about 1,800 to 2,900 km down

Front 20

Core

Back 20

Innermost region of Earth

Hint 20

Scientists think that the core is made mostly of iron

Front 21

Continental drift

Back 21

theory that the continents were at one or more times a singlw landmass that broke apart and eventually moved into the positions they are in today

Hint 21

A german scientist named albert wegener called it continental drift

Front 22

Pangaea

Back 22

single,giant landmass, or continent, that later broke apart

Hint 22

meaning "all lands"

Front 23

mid-ocean ridge

Back 23

Ocean-floor feature resembling a mountain ridge on land.

Hint 23

These ridges are part of series of underwater mountain ranges that run along the floors of all oceans

Front 24

Rift valley

Back 24

flat area between two ridges that is formed by spreading plates

Hint 24

There are many earthquakes and volcaneos in rift valleys

Front 25

Seafloor spreading

Back 25

process that form new seafloor

Hint 25

Seafloor spreading is partly what drives the movement of the continent or continental drift

Front 26

Trench

Back 26

deep canyon

Hint 26

Trenches are the deepest parts of the oceans

Front 27

subduction

Back 27

Place where old oceanic crust is forced back down into an ocean trench.

Hint 27

Alot of volcanioc activity and many earthquakes occurr near subuction zones

Front 28

Tectonic plates

Back 28

large,solid piece of Earth's surface

Hint 28

there are 7 large tectonic plates and about 14 smaller ones

Front 29

Theory of Plate Tectonics

Back 29

theory that Earth's crust is broken into plates that float on th eupper part of the mantle

Hint 29

The theory of plate tectonic combines the theories of continental drift and seafloor spreading

Front 30

Convection current

Back 30

movement of a gas or a liquid caused by changes in temperature

Hint 30

warm air rises and cool air sinks

Front 31

Plate boundary

Back 31

place where two plates

Hint 31

Scientists have identifield three different kinds of plate boundaries: transform,convergent, and divergent

Front 32

Magma chamber

Back 32

underground pocket of molten rock

Hint 32

Hotter than the surrounding rock, the magma melts the soild rock around it and rises to the surface

Front 33

Hot Spot

Back 33

Place where magma reaches the surface of a tectonic plate.

Hint 33

As the plate moves over the hot spot, new layers of volcanic mountains are built up.