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BJU Earth Science Chapter 8A Review Flashcards | StudBud
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BJU Earth Science Chapter 8A Review
BJU Earth Science Chapter 8A Review
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Answers
1
Hawaii is not on a plate boundary but a hotspot caused by plate movement
True
False
2
a geyser is ...
any process or feature that involves forcible entry of magma into a rock.
energy generated and stored in the earth that can be harnessed
a hot spring that ejects hot water and steam
an area where hot water quiet ly comes to the surface
3
What kind of rocks are volcanoes made of?
viscous
igneous
metamorphic
sedimentary
4
What is a lahar?
A mudflow.
A lava flow.
Volcano ash.
5
Look at the diagram. What is the name of the part of the volcano labeled #1?
magma
vent
lava
6
A volcano can release gas into the air
False
True
7
Whats a pahoehoe?
slow moving, sharp lava
fast, shiny, smooth ,wrinkled ropey lava
bumpy wrinkled lava
smooth slick lava
8
What is a Volcano?
An opening of the Earth through which molten rocks reach earth's surface
A large storm with high speed winds
A violent shaking of the Earth caused by bumping of two tectonic plates
A large cloud that generates rain, hail and lightning
9
Examine the diagram of a volcano above.Name the feature of the volcano labelled
A
Vent
Magma Chamber
Crater
10
In the diagram, A refers to
lava flow
eruption cloud
vent
magma chamber
11
What is the depression on top of a volcano called?
Plume
Vent
Digit
Crater
12
What is a fumarole?
A smoking person
An opening of boiling water
An opening where boiling mud comes out
An opening where hot gases escape
13
Why do we study volcanoes?
To save lives
they harm people
Because they are dangerous
Because they're interesting
14
We have two active volcanic belts existing on our planet, one is the Circum-Pacific Belt, the other one is ______.
Pacific Ring of Fire
Alpine-Himalayan Belt
San Andreas Fault
Mt. St. Helens Mountain Range
15
What is pillow lava
Lava that is shot high into the air from a volcano.
Underwater lava that is very jagged and rough.
Lava that is underwater; looks like pillow shapes.
Lava that forms round shapes underwater.
16
What is tephra?
Ash
All of these.
Cinders
Volcanic Bombs
17
What is Aa lava?
Lava that is in the process of cooling.
A wrinkly lava that flows very slowly.
Lava that is underwater.
Lava that is slow moving, and forms sharp edges.
18
Which is not a type of pyroclastic material?
magma
bombs
cinder
ash
19
the deeper you go into the earth the hotter it gets is called geothermal gradient
False
True
20
whats a vent
quiet eruption
opening through which molten rock and gas leave a volcano
explosive erruption
