Volcanoes and Geologic TIme Scale Test Review

Question 1

Volcano

Answer 1

Vent through which lava, rock fragments, hot vapors , and gas are being or have erupted

Question 2

_____ volcanoes are formed from fast flowing, lava which flows easily over the surface, forming larger volcanoes with gentle sides

Answer 2

Shield

Question 3

As magma rises towards the surface it collects in a ‘room’ called a _____ _____

Answer 3

Magma Chamber

Question 4

How do volcanoes on the Hawaiian Islands form?

Answer 4

Hotspots

Question 5

A broad volcanoes with gently sloping sides is a _____volcano

Answer 5

Shield

Question 6

What is molten rock that has formed deep within the Earth?

Answer 6

Magma

Question 7

A small volcano with steep sides and pyroclastic ash is called_____volcano.

Answer 7

Cinder

Question 8

One major belt of volcanoes that surrounds the Pacific Ocean is called the _____ __ _____

Answer 8

Ring Of Fire

Question 9

A steep-sided volcano formed from alternating layers of lava and ash is called _____ volcano.

Answer 9

Composite

Question 10

What type of volcano is Mt. St. Helens?

Answer 10

Composite

Question 11

Hot fast moving lava is called _____ lava flow.

Answer 11

A’a’

Question 12

What island do we know has a volcano erupting today? What type of volcano is it?

Answer 12

Hawaii, Shield

Question 13

Volcanoes that are NOT found at plate boundaries occur in the middle of plates in areas called_____.

Answer 13

Hotspots

Question 14

A type of eruption where magma flows easily, thin runny lava oozes quierly from the vent.

Answer 14

Quiet Eruption

Question 15

When an explosive eruption forms a mixture of hot rock, ash, and gas, this material is called a…?

Answer 15

Pyroclast

Question 16

Which type of volcano is Mount Fuji in Japan?

Answer 16

Composite

Question 17

Volcanoes that have recently erupted are known as:

Answer 17

Active

Question 18

What are scientists that study volcanoes called?

Answer 18

Volcanologist

Question 19

What type of volcano is Kilauea, which is located in Hawaii?

Answer 19

Shield

Question 20

Cool, slow moving lava, which a rough and jagged surface is called_____

Answer 20

Pahoehoe

Question 21

What is opening that extends from the magma chamber to the top of the volcano called?

Answer 21

Vent

Question 22

What is / are sign(s) that a volcano may erupt soon? (4)

Answer 22

Earthquakes, Swelling of Volcano, Smoke, and Displaced Ground

Question 23

What type of volcano is the most explosive?

Answer 23

Composite

Question 24

A volcano that has erupted in the last 2000 years, but not recently is known as _____

Answer 24

Dormant

Question 25

A combination of explosive (pyroclasts) and quiet (lava) eruptions will create a_____volcano.

Answer 25

Composite

Question 26

What factor(s) determine(s) whether an eruption will be explosive?

Answer 26

Viscosity of liquid, gas pressure buildup

Question 27

The loudest sound ever recorded was the eruption of_____.

Answer 27

Krakatoa

Question 28

What is a huge hole left behind when a volcano has an enormous eruption and empties the magma chamber and the main vent?

Answer 28

Caldera

Question 29

What are solid rock fragments that are ejected during a volcanic eruption?

Answer 29

Pyroclast

Question 30

What is a fissure?

Answer 30

Crack/opening in earth's crust

Question 31

Name 4 substances that can come out of volcanoes.

Answer 31

lava, rock, gas, water vapor

Question 32

What is Magma when it reaches the surface of Earth?

Answer 32

Lava

Question 33

Which type of volcano has a short life span?

Answer 33

Cinder

Question 34

A bowl shaped area that may form at the top of a volcano around the central vent

Answer 34

Crater

Question 35

Large projectiles thrown through the air during an eruption are called_____

Answer 35

Pyroclastic Bombs

Question 36

Volcanoes that have not erupted for at least 10,000 years and are not expected to erupt again are described as...

Answer 36

Extinct

Question 37

Geologic Time Scale-

Answer 37

Order of Earth's History (conditions, life, extinctions)

Question 38

When did birds first appear?

Answer 38

Mesozoic-Jurassic

Question 39

The biggest mass extinction event in history, which allowed reptiles and mammals to flourish, occurred between what 2 periods

Answer 39

Permian/Triassic

Question 40

What is the name of the very harsh time when no life existed on Earth?

Answer 40

Hadean Eon

Question 41

At this time, what us the believed age of the Earth?

Answer 41

4.5 Billion Years

Question 42

What type of event usually marks the end if an Era?

Answer 42

Extinction

Question 43

What is the name of a scientist who studies fossils?

Answer 43

Paleontologist

Question 44

What does the word "extinction" mean?

Answer 44

Termination of a species/organism

Question 45

What period was the "age of fish"?

Answer 45

Devonian

Question 46

What is a fossil?

Answer 46

Preserved Remains

Question 47

What us the benefit of radiometric dating? What do scientists use it to determine?

Answer 47

Age of a fossil using half lives/ Absolute dating of a specimen