Unit 2

Question 1

instrument used to measure volcanic gases

Answer 1

correlation spectrometer

Question 2

vertical intrusion of magma between rock layers

Answer 2

dike

Question 3

immediate return of deformed rock to its natural shape

Answer 3

elastic rebound

Question 4

location on the earth’s surface directly over the focus of an earthquake

Answer 4

epicenter

Question 5

specific point in the earth where the rock layers along a fault move, producing an earthquake

Answer 5

focus

Question 6

semi-dark line that indicates the ridge of a fold on a geologic map

Answer 6

fold axis

Question 7

block of rock below the slant of a fault

Answer 7

footwall

Question 8

mini-quakes that usually occur before a major earthquake

Answer 8

foreshocks

Question 9

shows locations and types of rocks and other features, like faults and folds

Answer 9

geologic map

Question 10

energy produced from the heat of magma and other volcanic materials

Answer 10

geothermal energy

Question 11

What causes an earthquake

Answer 11

Heat from Earth’s mantle
Plate tectonics

Question 12

What causes an volcanic activity

Answer 12

fault lines
the Ring of Fire
plate boundaries

Question 13

When stress on rocks becomes too great, they break, and then undergo:

Answer 13

elastic rebound

Question 14

Magma that is highly viscous with a high silica and gas content creates an eruption that is _____.

Answer 14

very explosive

Question 15

a scale of magnitude used to measure the relative size or strength of an earthquake

Answer 15

Richter scale

Question 16

newer magnitude scale that measures the amount of moved or displaced rock along a fault to determine the strength of an earthquake

Answer 16

moment magnitude scale

Question 17

scale that measures the effects or severity of damage from an earthquake

Answer 17

Mercalli intensity scale

Question 18

instrument used to measure and record vibrations that result from earth movements

Answer 18

seismograph

Question 19

instrument used to measure ground swelling, which usually occurs from magma building in the magma chamber of a volcano

Answer 19

tiltmeter

Question 20

earthquake with magnitude of 2.0 in a Richter scale can….

Answer 20

be barely felt

Question 21

earthquake with magnitude of 8.0 in a Richter scale can….

Answer 21

destroys cities

Question 22

In order to locate an earthquake’s epicenter, seismology centers compare the arrival times of:

Answer 22

P and S waves

Question 23

To predict earthquakes, geologists look for a combination of the following signs:

Answer 23

foreshocks
decreases in well water levels
increases in radon gas in ground water

Question 24

A vast plain of rolling hills are actually folds of _____.

Answer 24

anticlines and synclines

Question 25

fold where hills arch up

Answer 25

anticline

Question 26

simplest type of fold, where rock layers incline in the same direction

Answer 26

monocline

Question 27

broad, gentle fold of a large area that occurs from rock layers upwarping; looks like an ***upside-down bowl***

Answer 27

dome

Question 28

broad, gentle fold of a large area that occurs from rock layers downwarping; looks like a*** bowl right-side up***

Answer 28

basin

Question 29

What type of mountains occur at normal faults from the footwall being thrust upward along the hanging wall.

Answer 29

Fault-Block

Question 30

horizontal intrusion of magma that builds and bubbles like a dome within the rock layers

Answer 30

laccolith

Question 31

horizontal intrusion of magma into rock layers

Answer 31

sill

Question 32

massive layer of magma underneath sedimentary rock that usually forms the base of mountains

Answer 32

batholith

Question 33

The capital letter(s) that label a rock unit (e.g., KJk) on a geologic map represents the rock unit's _____.

Answer 33

age range

Question 34

Volcanoes that are tall, steep, and made of both lava and volcanic material are

Answer 34

composite

Question 35

Tall, gradually sloped volcanoes made mostly of lava flow are _____ volcanoes.

Answer 35

shield

Question 36

what are the basic features of a map

Answer 36

title scale legend compass

Question 37

What type of maps include colors, letter symbols, fault lines and contact lines?

Answer 37

geologic maps

Question 38

What type of map focuses geological features' shapes, elevations, and steepness of slopes

Answer 38

Topographic Maps

Question 39

Earthquakes can be predicted. T/F

Answer 39

False

Question 40

What could help create a volcano

Answer 40

cracks in Earth's crust plate tectonics built up magma

Question 41

The Pacific plate collides with and is subducted under four other crustal plates. The area where this happens has lots of volcanic activity. This area is called the _____.

Answer 41

Ring of Fire

Question 42

A volcano with basaltic magma would probably _____.

Answer 42

erupt with a gradual lava flow

Question 43

This feature occurs in an area where water is heated under ground to the point of boiling. When the water and steam build, they finally rise through a vent on the surface, spraying water and steam high up into the air. This feature is a _____.

Answer 43

geyser

Question 44

Naturally hot water containing many minerals and found on the surface of the earth is called a _____.

Answer 44

hot spring

Question 45

A natural disaster produced by volcanic activity that has killed more people than lava flows is _____.

Answer 45

a landslide or mudslide

Question 46

Mount Tambora in Indonesia erupted and caused the "Year without a Summer." Over 100,000 people died from starvation because of the resulting _____.

Answer 46

climate change

Question 47

A tiltmeter is a volcanic monitoring tool that measures _____.

Answer 47

ground swelling

Question 48

Volcano eruption can be predicted

Answer 48

True