Earth Science Unit 2: Plate Tectonics, Earthquakes and Volcanoes

Question 1

Which of the seismic waves arrive first?

Accepted Answer

P waves

Question 2

Which of the seismic waves do the most damage?

Accepted Answer

Surface Waves

Question 3

Small volcano with steep sides.

Accepted Answer

Cinder-cone

Question 4

In comparison, oceanic crust is ???? than continental crust.

Accepted Answer

thinner and more dense

Question 5

All material thrown into the air during a volcanic eruption is known as ___.

Accepted Answer

tephra

Question 6

Major earthquakes are followed by

Accepted Answer

Aftershocks

Question 7

In a volcano, lava erupts through an opening called a(n) ____.

Accepted Answer

vent

Question 8

Molten material below the surface of the Earth

Accepted Answer

Magma

Question 9

Origin of an earthquake inside the Earth.

Accepted Answer

Focus

Question 10

Liquid rock under the surface is called:

Accepted Answer

Magma

Question 11

Type of fault formed as a result of rocks moving apart (tension stress).

Accepted Answer

Normal

Question 12

Scientist who provided the missing link of seafloor spreading to his predecessor 50 years later

Accepted Answer

Hess

Question 13

A small bowl-shaped depression at the top of a volcano.

Accepted Answer

Crater

Question 14

The San Andreas fault system is at a _____________________ boundary.

Accepted Answer

transform

Question 15

Movement of tectonic plates and volcanic eruptions cause earthquakes.

Accepted Answer

True

Question 16

Rapidly moving gaseous volcanic material can also be called a(n) _____.

Accepted Answer

pyroclastic flow

Question 17

The Circum-Pacific Belt is also called ??, which is where most of the Earth’s volcanoes are

Accepted Answer

the Ring of Fire

Question 18

Term referring to all the continents joined together to form a "super continent."

Accepted Answer

Pangaea

Question 19

Type of fault formed as a result of the rocks sliding horizontally past each other.

Accepted Answer

Strike-slip

Question 20

Volcano with gently sloping sides.

Accepted Answer

Shield

Question 21

The least explosive of the volcanos

Accepted Answer

Shield

Question 22

Largest of the volcanoes.

Accepted Answer

Composite

Question 23

Volcano that is the most explosive.

Accepted Answer

Composite

Question 24

Which occurs at a diverging plate boundary?

Accepted Answer

underwater mountain ranges and rift valleys

Question 25

Scale used by scientists to compare the energy released by earthquakes

Accepted Answer

Moment Magnitude Scale

Question 26

The scale used by seismologists to measure earthquakes, no matter how big or how far away, is:

Accepted Answer

Moment magnitude scale

Question 27

Point directly above the earthquake's focus on the surface of the earth

Accepted Answer

Epicenter

Question 28

What type of energy is released that causes natural vibrations of the ground?

Accepted Answer

seismic

Question 29

Crust is neither created nor destroyed at which of these boundaries?

Accepted Answer

transform

Question 30

This decreases as the distance from the epicenter increases

Accepted Answer

Intensity

Question 31

Most volcanoes occur at convergent plate boundaries.

Accepted Answer

True

Question 32

Earthquakes are measured by an instrument called a(n) ___

Accepted Answer

seismometer

Question 33

Plate movement is very slow.

Accepted Answer

True

Question 34

S waves do NOT travel through the:

Accepted Answer

Lithosphere

Question 35

Subduction occurs when one plate is pushed under another plate.

Accepted Answer

True

Question 36

Compared to ocean crust close to continents, ocean crust near mid-ocean ridges is

Accepted Answer

younger

Question 37

The highest magnitude possible for an earthquake is:

Accepted Answer

10

Question 38

Molten material above the surface of the Earth

Accepted Answer

Lava

Question 39

At an oceanic-oceanic convergent boundary,

Accepted Answer

old crust is recycled by subduction

Question 40

Scientists rejected Wegener's hypothesis because he could not explain HOW continents moved.

Accepted Answer

True

Question 41

Type of fault formed as a result of rocks moving toward each other (compression stress).

Accepted Answer

Reverse

Question 42

NC has experienced earthquakes, but NOT often since it is not at the edge of a tectonic plate.

Accepted Answer

True

Question 43

Tectonic plates can collide and make mountains

Accepted Answer

True

Question 44

The force that causes plate movement is

Accepted Answer

mantle convection currents

Question 45

Flow of cloud, gas, and ash down a slope at high speeds (rapidly moving volcanic material)

Accepted Answer

Pyroclastic flow

Question 46

Volcanic activity in the middle of a plate is called:

Accepted Answer

Hot spot

Question 47

Harry Hess used rocks, fossils and climate evidence in his theory of plate tectonics.

Accepted Answer

False

Question 48

What is the "missing link" that explains the force behind Wegener's Theory?

Accepted Answer

Sea floor spreading

Question 49

Viscosity describes a solid’s ability to flow.

Accepted Answer

False

Question 50

The size of the Atlantic Ocean is

Accepted Answer

increasing

Question 51

Magnitude changes with distance from the earthquake.

Accepted Answer

False

Question 52

A rock's reaction to stress.

Accepted Answer

Fault

Question 53

What is the minimum number of seismic locations needed to find the epicenter of an earthquake?

Accepted Answer

3

Question 54

The collapsed top of a volcano.

Accepted Answer

Caldera

Question 55

Which is NOT evidence that plate tectonics is taking place?

Accepted Answer

hurricane records

Question 56

Which of the following seismic waves can travel through liquid and solids?

Accepted Answer

P waves

Earth Science Unit 2: Plate Tectonics, Earthquakes and Volcanoes

Questions 56

Earth Science Unit 2: Plate Tectonics, Earthquakes and Volcanoes

Questions 56