Earth

Question 1

List Earth’s layers:

Answer 1

Inner Core, Outer Core, Mantle, Crust, Asthenosphere, Lithospehre

Question 2

slabs of rock that fit together like a puzzle

Answer 2

Tectonic Plates

Question 3

Plate movement (boundaries):

Answer 3

Divergent (move apart), Convergent (collide), and Transform (rub past)

Question 4

the hot soft rock rises, cools, sinks, then is heated again and rises.

Answer 4

Convection Current

Question 5

when gravity pulls the edge of a plate into the asthenoshere

Answer 5

Slab Pull

Question 6

when material from an ocean ridge slides downhill the material pushes the plate

Answer 6

Ridge Push:

Question 7

Who discovered Proof of Pangea?

Answer 7

Alfred Wegenrer

Question 8

Scientists rejected it because:

Answer 8

He could not explain how or why the continents move

Question 9

If two convergent plate’s collide, a ___ zone forms

Answer 9

Subduction

Question 10

The youngest rocks on the ocean floor are located at

Answer 10

mid-ocean ridges

Question 11

The hypothesis that continents have slowly moved to where they are today.

Answer 11

Continental Drift

Question 12

Proof that Earth has reversed itself in the past based on the alignment of iron minerals in rocks

Answer 12

Magnetic Field

Question 13

Pangea:

Answer 13

A supercontinent that was made up of all the contents

Question 14

While studying the ocean floor, scientists found ___ bands of magnetism

Answer 14

alternating

Question 15

___ currents inside Earth may cause plate motion

Answer 15

Convection

Question 16

Scientists believe that differences in ____ cause hot, plasticlike rock in the mantle to rise toward Earth’s surface

Answer 16

density

Question 17

A __ can form when two oceanic plates collide

Answer 17

line of volcanos

Question 18

The magnetic patten of the ocean floor rocks on one side of the ridge is a ____ image of that of the other side

Answer 18

mirror

Question 19

Vast, underwater mountain chain

Answer 19

Deep Sea Trench

Question 20

The theory that Earth’s surface is divided into rigid plates that move relative to one another

Answer 20

Plate Tectonics

Question 21

Facts that support Continental Drift:

Answer 21

Limestone in App. mountains matches those in Greenland, Rocks in Brazil match those in West Africa, Coastlines fit together like a puzzle, Ice grooves in warm continents

Question 22

The largest chain of mountains on Earth

Answer 22

Mid Ocean Ridge

Question 23

The worlds largest ridge, running the length of the Atlantic Ocean. Is 6,200 miles.

Answer 23

Mid Atlantic Ridge

Question 24

A deep valley formed underwater as tectonic plates move apart

Answer 24

Rift Valleys

Question 25

when the North pole magnetic field changes with the South poles magnetic field

Answer 25

Magnetic Reversal

Question 26

when the magnetic field is opposite of what it should be

Answer 26

Reverse Polarity

Question 27

the process by which new oceanic crust forms along a mid oceanic ridge and the older crust moves away from the ridge.

Answer 27

Seafloor Spreading

Question 28

a state in which magnetized objects, such as compass needles, will orient themselves to point North

Answer 28

Normal Polarity