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BJU Earth Science Chapter 8 Section A test review Flashcards | StudBud
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BJU Earth Science Chapter 8 Section A test review
BJU Earth Science Chapter 8 Section A test review
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Questions
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Answers
1
What is pyroclastic material?
The poisons left in the air after a pyroclastic flow
Large ash
The material inside of a pyroclastic flow
The material that is emitted during a volcanic eruption
2
The Circum-Pacific volcano belt is sometimes called the:
Volcano ring
Ring of Fire
Circus stunt
Fire ring
3
When magma forces itself through a tiny space in the side of a volcano, the space is called a:
Plug
Crater
Vent
Volcanic cone
4
Volcanoes are quite easy to spot on topographical maps.
True
False
5
Magma that is thick is more _________ than runny magma
Viscous
Fast
Slow
Silica
6
___________ magma contains less than 52% __________.
Basaltic, silica
Basaltic, viscous
Andesitic, viscous
Rhyolitic, silica
7
What process forms a caldera?
A basin that forms at the base of an extinct volcano
Water filling up an extinct volcanic crater
The volcanic cone collapses into the magma chamber
An immense volcanic explosion
8
One kind of lava flows slowly and has a shattered looking surface. This is called:
a'a'
Pahoehoe
Andeisite
Rhylotite
9
__________ lava tends to be light in color, and is very solid.
Basaltic
Rhyolitic
Viscous
Andesitic
10
What is tephra?
A thick layer of cinders and ash left after an eruption
The cloud of ash and other volcanic material
The material first spewed out of a volcano
A layer of loose pyroclastic material that covers the ground
11
A ________ is a ________ mountain landform built from solidified magma
Mountain, erosional
Volcano, depositional
Hill, depositional
Volcano, erosional
12
Nearly
all volcano landforms likely formed _________ the Flood.
During
Much earlier
Before
Shortly after
13
Most volcanoes have at least one:
Caldera
Parasitic vent
Vent
Crater
14
"normal" volcanoes are referred to as __________ volcanoes
Extrusive
Igneous
Intrusive
Outrustive
15
Another name for "pyroclastic flow" is:
Material
Pyroclastic material
Avalanche
Glowing avalanche
16
The eruption of Mt _______________ in Iceland caused a massive grounding of air traffic
Snæfellsjökull
Vulcano Island
Eyjafijallajökull
Vesuvius
17
Lava with a smooth, wrinkled, ropey surface is called:
pahoehoe
Silica
Rhyolitic
a'a'
18
All types of magma contains:
Silica
Basalt
Viscous
Andesite
19
Thick layers of igneous rocks in various areas are called:
Layered rock
River basalts
Flood basalts
Flood basaltic layer
20
Processes that form igneous structures related to volcanoes inside the crust are called:
Extrusive volcanism
Intrusive volcanism
Volcanism
Outrusive volcanism
21
Solidified lava layers underwater are called:
Sheet lava
Underwater lava
Blanket lava
Pillow lava
22
The English word volcano comes from _______________
Vulcano
Vesuvius
Vulcano Island
Isola Vulcano
23
The Mackenzie Large Igneous Province is ___________ sq. km.
3,600,000
2,700,000
2,300,000
3,200,000
24
_________ chambers are spaces that were melted by the material inside of them
Melted rock
Magma
Lava
Molten rock
25
Volcanoes are made of _________ rock
Sediment
Igneous
Depositional
Mud
26
Volcanic mudslide material is called:
Lahar
Fumaroles
Material
Tephra
27
Scientists think that there are ___________ volcanoes that are either dormant or active.
1750
1000
1500
1250
28
The ___________ belt lies above the collision boundary of the African, Asian, and Indian plates
Alpine-Himalayan volcano belt
Himalayan-Pacific volcano belt
Circum-Pacific volcano belt
Circum-Alpine volcano belt
29
When ________ reaches the surface of the earth, it is called _________:
Lava, molten rock
Magma, lava
Lava, magma
Molten rock, magma
