Chapter 8- Plate Tectonics

Question 0

What is a long row of towering mountains?

Answer 0

Ridge

Question 1

What is a long narrow canyon in the ocean floor?

Answer 1

Trench

Question 2

Which layer of earth is solid and made mostly of iron?

Answer 2

Inner core

Question 3

Which layer is made mostly of iron mixed with smaller amounts of other materials?

Answer 3

Outer core

Question 4

Which layer is made of oxygen, combined with silicon, magnesium, and iron ore?

Answer 4

Mantle

Question 5

Which layer is made of oxygen, silicon, aluminum, iron, and calcium? Also the thinnest layer

Answer 5

Crust

Question 6

Which plate is most of the United States on?

Answer 6

North American Plate

Question 7

Which plate is Hawaii on?

Answer 7

Pacific Plate

Question 8

Why didn’t scientists accept the idea of continental drift?

Answer 8

Wegner couldn’t answer the question “What force could be strong enough to move whole continents?”

Question 9

Do hot liquids float or sink? Do they weigh more or less?

Answer 9

Float. They weigh less.

Question 10

Which boundary is sea floor spreading found at?

Answer 10

Spreading boundary

Question 11

How many plates is the lithosphere broken into?

Answer 11

20

Question 12

How is an earth quakes epicenter related to its focus?

Answer 12

The epicenter is directly over the focus

Question 13

True or false?

The inner part of earth’s crust is hot, melted rock.

Answer 13

False.

Question 14

True or false?

The temperature at Earth’s core is as hot as the sun

Answer 14

True

Question 15

True or false?

Earth’s crust and the outer mantle make up the lithosphere

Answer 15

True

Question 16

True or false?

The lithosphere is broken into plates that float on melted rock

Answer 16

True

Question 17

True or false?

Tectonic plates are found on continents

Answer 17

False

Question 18

The outermost layer of earth?

Answer 18

Crust

Question 19

Earths crust and the solid part of the mantle

Answer 19

Lithosphere

Question 20

What is the inner most layer of earth?

Answer 20

The core

Question 21

The layer of earth just below the crust is called?

Answer 21

The mantle

Question 22

True or false?

Earth’s crust contains most of Earth’s mass

Answer 22

False

Question 23

True or false?

The outer core is liquid and the inner core is solid

Answer 23

True

Question 24

True or false? The ocean floor contains deep trenches and mountains

Answer 24

True

Question 25

True or false? Convection currents in the ocean cause tectonic plates to move

Answer 25

False

Question 26

True or false? Reversing magnetic fields in rock proved new crust is forming on the ocean floor

Answer 26

True

Question 27

What is the theory that continents drifted apart in the past and continue to do so today called?

Answer 27

Continental drift

Question 28

New crust is formed by _____ that cools on the ocean floor

Answer 28

Magma

Question 29

The force that moves Earth's played is called _________.

Answer 29

Convection

Question 30

True or false? When one plate slides under another, volcanoes and ocean trenches can occur

Answer 30

True

Question 32

What is the area where 2 plates meet?

Answer 32

Plate boundaries

Question 33

What is a break in the Earth's crust

Answer 33

Fault

Question 34

Theory stating that pieces of the lithosphere constantly move on top of a layer of partly melted rock is called

Answer 34

Plate tectonics

Question 35

Deep ocean trenches can form at ______ boundary

Answer 35

Colliding

Question 36

Huge valleys can form at a _____ boundary

Answer 36

Fracture

Question 37

Earth quakes can form at a _____ boundary

Answer 37

Fracture

Question 38

Mountains can form at a ____ boundary

Answer 38

Colliding

Question 39

True or false? Most volcanoes can't be seen because they lie on the ocean bottom

Answer 39

True

Question 40

True or false? Most earth quakes and volcanoes occur at plate boundaries

Answer 40

False

Question 41

The under ground point where the earth quake occurs is the_____

Answer 41

Epicenter

Question 42

An instrument called a ______ detects tremors

Answer 42

Seismometer

Question 43

__________ from satellites measure the movements of earths plates

Answer 43

Laser beams