Science teset Flashcards
what type of rocks are volcanoes made of
igneous
The term volcano originally came from the name for what
Roman God
A_____________ is a depositional mountain built up by molsten rock that has risen to the earth’s surface through a vent
volcano
a volcano begins to form when magma forces its way to the surfac and breaks through forming a hole or what
vent
what is magma that reaches the earth’s surface
lava
The depression found at the top of most volcanic cones is called a __________
Crater
What is a crater like depression cuased by an explosion or the collapse of a volcanic cone
caldera
Where does pillow lava form
under water
Does a pyroclastic flow or glowing avalanche contain both gases and hto solid particles
yes
A mudslide caused a volcano is called a what
lahar
A ______________ is a vent in the ground through which hot gasses escape
fumaroles
Is the term tephra used to descube flowing lava that has cooled and soldfied on the ground
no
What are tiny angular galassy garments of solid lava called
ash
What is a steramlined mass o ejected lava blobs that soldified in flight called
bomb
Which of these lists is in the correct order from samllest to largest ash cinder bomb ash bomb cinder cinder ahs bomb cinder bomb ash
ash cinder bomb
Is the circum pacific volcano belt sometimes called the ring of fire
yes
Are many volcanoes found in areas of tectonic activity
yes
Which organimsa re the base or first step of the food chainaround black smokers deep within the ocean
bacteria
Flood _____ are thick layers of igneous rock covering larege portions of teh eath they are thought to have formed whn huge quantitiies of mama were realeased through cracks in the earth’s curst
basalts
What is a volcao that emits molsty lava in quiet eruptions
shield volcanoes
Can volcanoes be classifeid by age structure and activity
no
what is teh name of a volco that emists lava and solid debries in alternatley quiet and explosives eruptions
stratovolcanoes
Do stratovolcaoes release lava and pyroclasitc materail that form layers or strata
yes
What is the name of a volcao that emits moslty cindrs, ahses, and bombs
cinder cones
Which of the following is not aterm realating to the activity levle of a volcano active inert extinct or dormatn
inert
What is the name of a colcao that has no historical reord of erpution and showing no seismic indications of activity deep undergoudn
extinct
Which of these volcanoes is located in the state of Washington
Mt saint helens
Have some volcaoes that were considered dormant erupted with disastrous reslults
yes
Which of the following statements descibes a typial young earth creation gologists view of volcanoes
most formed druing or shorly after the flood
The VEI of a volcnaos’s eripton is based on what
The amount of tephra a volcano produces, Height of teh eruption cloud, and a dieseroptive estimate of teh explosian
Vertical is to dike as horizontal is to what
sills
are sill and dikes products of intrusive volcanism
yes
Did the eruption of MT. Tambora affect not just the island wher it occurered but the weateher of the entie eath for more than a year
yes
Batholiths and laccoliths are both types of what
plutons
does the term geothermal gradient refer to the way the temperature withing the earth decreases continouously with depth
no
Unlike hot springs geysers do not precuce distinct mineral epostis
false
A hydrotheraml circuit is best seen in what
eruption of a geyser
Is geyser water heated by magma
yes
A spring that periodically ejects large quantities of hot water and steam is known as a what
geyser
The internal energy of the eart, particularly evident in areas where hot springs and getsers exist, is sometimes harnessed for a man’s use This is called____________ energy
geotheraml
Has geotheraml envergy become the larggs source of electricity in the United States
no
Which structure type is omposed of alternating layers of lava and cindrs
Stratovolcano
Study The Diagram
Channel for lava
neck
Intrusions
sill/dikes
side cone
parasitic vent
depression
crater
Layer of pyroclastic materail and ash
tephra
structure
composite cone
Molten rock
Magma chamber
erupts lava
vent
