Student Questions on Chapter 4
Place your practice question for Chapter 4 in this exam. You can write a multiple choice, matching, or essay question. Be sure your question is original. Remember to put your name in parentheses at the end of the question field.
Fragmental materials of volcanic rock are called?
Plutonic
Pyroclastic
vesicles
what is the fine grain texture called? (Zach Gaston)
aphanitic
phaneritic
porphyritic
glassy
Which rock compistion contains large amounts of silica, greater then 65%? (Jordan Vitek)
Felsic
Intermediate
Mafic
Ultramafic
Which of the 4 different compositions of igneous rocks contains the highest amount of silica concentration? (Melissa Newborg)
Intermediate
Ultramafic
Felsic
Mafic
What type of valcano is composed of multiple, overlapping volcanic domes?
Composite
Dome
Shield
Cinder
Which of the four types of composition does the intrusive rock, Gabbro fall under? (Katie Scott)
Mafic
Felsic
Intermediate
Ultramafic
Which type of rock is intermediate in composition and phaneritic? (Brigid Hoffman)
Andesite
Diorite
Gabbro
Basalt
Granite
When magama reaches the surface there is less pressure exerted upon it. This results in the release of gases in the magma which can cause the eruption to be____________. (Brittany Kjerstad)
Explosive
Intrusive
Quiet
None of the above
Which composition does diorite belong to?(Kayla Aase)
Mafic
Felsic
Intermediate
Ultramafic
Which of the following is Not a landform that creates volcanoes? (Abby George)
Ridges
Valleys
Mountains
Hills
What is the term used when an extreme cases when lava seemingly does not flow at all but merely squeezes out as large mounds directly over the volcanic vent? (Jennifer Berg)
Batholiths
Lava domes
Dikes
Pyroclastic-fall deposits
Welded tuff
Which has the least amount of silica? (Erin Aase)
Felsic
Intermediate
Mafic
Ultramafic
Which of the following is not a composition of igneous rock? (Shuree Hohn)
Intermediate
Mafic
Ultrafelsic
Felsic
Ultramafic
What word derives from Pluto, the Greek god of the underworld? (Laine Hale)
aphanitic
porphyritic
pyroclastic
extrusive
intrusive
If an igenous rock has a high melting point and is high in Iron, Magnesium, or Calcium it is likely classified as _______ . (Anthony Rath)
Felsic
Intermediate
Mafic
Ultramafic
What rock is formed from mafic magma? (Andrea Fee)
Gabbro
Granite
Rhyolite
Diorite
Dacite
What is a typical coarsed-grained igneous rock that with crystals as large as several meters.(Adrienne Braniff)
Geothermal Gradient
Silla
Pegmatite
Which of the following is an igneous rock texture? (Ashley Olivier)
Aphanitic
Phaneritic
Porphyritic
Glassy
All of the above
What is the two different rock compositions for the mafic category?(Geoff Popken)
bosalt/granite
gabbro/andesite
gabbro/bosalt
diorite/granite
None of the above
What is always solid? (Michelle Whitmore)
Earth's core
Earth's Mantle
Ocean Floor
Under Continents
What pyroclastic material is fine and flour-like? (Chris Berke
Pahoehoe Lava
Volcanic Ash
A'a Lava
Felsic Lava
________ is volcanic glass that lacks crystals. (Joel Brewer)
Olivine
Obsidian
Pyrite
Galena
__________ is the relationship of increasing temperature as a function of depth. (Davide Kearney)
assimilation
geothermal gradient
fractional crystallization
pumice
porphyritic
Which type of volcano ranges from 100m high to 3000m high?(Scott Dreessen)
Shield
Dome
Composite
Cinder
Which magma composition has the highest viscosity? (Tara Reade)
Rhyolitic
Basaltic
Andesitic
Dunite is classified as what type of Rock? (Brittney Johnson)
Felsic
Intermediate
Mafic
Ultramafic
Which of the following is NOT a corm of volcano?(Eric Koller)
Cinder Cone
Shield Volcano
Shield Cone
Composite cone
Dome complex
Which type of volcano has the most viscous magma?(Kendra Lundeby)
Dome Complexes
Shield Volcano
Composite Cones
Cinder Cones
Which type of volcano is formed by frequent eruptions over several hundred thousand years? (Matt Hicks)
Cinder Cone volcano
Shield volcano
Composite volcano
Dome complex volcano
Which type of magma composition has intermediate viscosity? (Rachael Chytka)
Rhyolitic
Basaltic
Andesitic
What are the largest fragments of pyroclastic material called? (Byron Storm)
bombs
volcanic ash
lapilli
dacite
clumps
Which is not an igneous rock texture? (Katie Van Dam)
Aphanitic
Phaneritic
Glassy
Mafic
Porphyritic
Through what type of fault line can water enter the Earths mantle, lowering the magma's melting point? (Justin Lux)
Transform
Divergent
Convergent
Where is an example of a hot spot? (Paige Gunhammer)
Hawaii
Japan
New Zealand
Italy
Fast cooling means what type of crystals? (Brianna Stangl)
small
blue
large
hard
Which type of volcano is very large and contains basalt? (Nicole Pribbenow)
Cinder cone
Composite volcano
Dome complexes
Shield volcano
What is the most dangerous type of lava flow, which usually results in a high casualty rate? (William Muller)
Lahars
A'a
Pyroclastic Flows
Pahoehoe
what term is used when lava errupts under water? (Brooke Mogensen)
pahaehoe
pillow
obsidian
sill
dike
What is a small volcano? (Molly Fuchser)
Shield
Cinder
Composite
Dome
Which of these minerals will not chemically react with magma, unless it melts? (Jerry Palleschi)
Quartz
Olivine
Plagioclase Feldspar
Garnet
What forms from the most felsic magmas? (Eva Draper)
Andesite and Diorite
Rhyolite and Granite
Dacite and Tonalite
Tonalite and Diorite
How are volcanoes classified? (Bethany Krush)
where and when it erupted
size, shape, and erupeted volcanic material.
by what minerals are found in the lava
Which of the following is the resulting large bodies of intrusive rocks (depending on the area of exposure at the surface? (Kelsey Van Gerpen)
sill
dike
batholiths
volcanic necks
welded tuff
What city was destroyed by a Lahar? This Lahar killed 25,000 people in 1985. (Garrett DeVries)
Armero, Colombia
Sydney, Australia
Rome, Italy
Tokyo, Japan
Las Angelos, California
Except for minor partial melting, ________ remains in solid form at depth in Earth's mantle. (Erin Alberts)
lahars
peridotite
basoliths
sills
The process when magma rises toward the surface, it comes in cotact with the surrounding rocks, and the rocks may partially or completely melt and mix into the magma, which changes its composition is called what?(Amanda Bak)
Pegmatite
Assimilation
Geothermal Gradient
Fractional Crystallization
Match the following correctly(David Collins)
4 Types of Composition
Felsic
Intermediate
Ultra Mafic
Mafic
Granite
Diorite
Olivine
Gabbro
__________ is felsic volcanic glass with dark gray to black color that seems uncharacteristic of felsic rocks. (korey potratz)
Obsidian
Aphanitic
Phaneritic
Which of igneous rock structure is usually plutonic/intrusive? (Justine Carroll)
aphanitic
glassy
phaneritic
porphyritic
__________represent former gas bubbles in the magma. (Gretchen Wuestewald)
Crystals
Dark colors
Vesicle holes
What is the term for underwater erupted magma? (Trenton Deis)
Pillow Lava
Round Lava
Underwater Lava
Water Lava
What are an extreme case where lava seemingly does not flow at all but merely squeezes out as large mounds directly over the vocanic vent.
Pyroclastic-fall deposits
Lava domes
Pyroclastic-flow deposits
Welded tuff
When Peridite is partially melted, what does it next become? (Adam B Larson)
Basalt
Andesite
Granite
Ash
Please report any errors in the exam or problems with the program to
Dr. Heaton
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