Posted by: mrborden | February 26, 2012

Volcanic Eruption Types


Fri March 2
QFD: The great men of science are supreme artists. ~Martin H. Fischer
?FD: What type of rocks are subjected to heat and pressure?
ESS3c. Students know how to explain the properties of rocks based on the physical and chemical conditions in which they formed, including plate tectonic processes
1) handout plotting volcanic eruptions and earthquakes around the world ( due by end of period)
2) film yosemite park national geographic – write a 1 page paper describing the geographic features of the park
3) film clips of volcanic eruptions

March 1
QFD: There are no foolish questions, and no man becomes a fool until he has stopped asking questions. ~Charles Proteus Steinmetz
?Fd: What type of rocks are formed from magma?
ESS3c. Students know how to explain the properties of rocks based on the physical and chemical conditions in which they formed, including plate tectonic processes
1) handout plotting volcanic eruptions and earthquakes around the world ( groups)
2) Due: volcano pictures 100 pts (cinder cone, composite, shield, + 50 words decribing each)
Rock types video
Feb 29
QFD: Curiosity will conquer fear even more than bravery will. ~James Stephens
?FD: What type of Volcano is Mt. St. Helens? Thick magma or thin? alot of silica or a little?
ESS3e. Students know there are two kinds of volcanoes: one kind with violent eruptions producing steep slopes and the other kind with voluminous lava flows producing gentle slopes
ESS3c. Students know how to explain the properties of rocks based on the physical and chemical conditions in which they formed, including plate tectonic processes
1) Quiz and then grade it (20 qs X 5 pts each = 100 pts)
2) Gold Rush
3) Yellowstone Park
4) Old faithful Camera
Quiz 5 pts each X 20 qs = 100 pts
1 What sort of terrain is a violent eruption of lava likely to create?
A Gentle sloping hills B Sudden, steep hills C flat plains D mountains
2 What sort of terrain is most likely to be the result of a voluminous lava flow?
A flat plains B steep slopes C gentle slopes D new mountains
3 What are the primary factors that determine whether a volcano will have a violent or quiet eruption?
A magma composition B pressure and temperature of gases within the volcano
C magma temperature D All of the above
4 During an explosive eruption, which provides the force to push molten rock out of the volcano’s vent?
A dissolved gases B a build-up of ash C pools of water D a low silica content high
5 A lava flow that is considered fluid has a __________.
A high silica content B a large volume of dissolved gases C low silica content D rhyolitic flow
6 The two main differences between a composite volcano and a shield volcano are their_____________.
A lava type and height B eruption frequency and height C lava type and shape D eruption frequency and shape
7 When Mount St. Helens erupted in 1980, it did so with huge pyroclastic flows and left steep slopes in its wake. What type of eruption was the one that occurred at Mount St. Helens?
A explosive B flowing C cinder cone D shielded
8 Mt. Fujiyama, the highest mountain in Japan at over 12,000 feet elevation, is an active volcano. Mt. Fujiyama has steep sloping sides that were likely formed by
A an accumulation of slow lava flows. B uplift from transform faulting. C violent volcanic eruption.
D both violent eruptions and continuous lava flows.
9 Mauna Loa, a volcano on the Island of Hawaii, is the Earth’s largest volcano. Mauna Loa has enormous gentle slopes, making it a
A shield volcano, created by an accumulation of slow lava flows. B shield volcano, created by a violent eruption. C composite volcano, created by both violent eruptions and slow lava flows.
D composite volcano, created by several violent eruptions.
10 Which of the following characteristics describe a shield volcano?
A voluminous lava flow creating gentle slopes B voluminous lava flow creating steep slopes
C violent eruption creating steep slopes D violent eruption creating flat plains

11 Mt. Pinatubo is an active volcano in the Philippines that has very viscous magma with dissolved volatile gas. When Mt. Pinatubo erupted in 1991, the magma
A was released in a slow lava flow that slowly released volatile gas. B caused an explosive eruption due to pressure from built up gas. C continuously flowed, adding to Mt. Pinatubo’s gentle sloping sides.
D flowed slowly until another island was formed in the Philippines.

12 The tallest volcano in the world is Mauna Kea in Hawaii. Mauna Kea has broad, gentle slopes created from the low viscosity lava that slowly flowed out in all directions. Based on this information, what type of volcano is Mauna Kea?
A stratovolcano B shield volcano C cinder cone D lava dome
13 A volcano in Mexico is made of pyroclastic material and has a steep conical hill that is 200 meters high. The summit has a bowl–shaped crater. What type of volcano is this?
A stratovolcano B shield volcano C cinder cone D lava dome
14 Rocks at the earth’s surface are continually broken down, compacted, and cemented together. What is the name of the resultant type of rock?
A igneous B metamorphic C lava D sedimentary
15 Metamorphic rock is made by which one of the following dynamic processes?
A compaction and cementing of sediments B subjection of rocks to heat and pressure
C cooling of magma D exposure of rocks to wind and rain
16 A rock is observed to have fossil impressions of plants preserved in it. This rock is most likely a(n) __________ rock.
A extrusive igneous B intrusive igneous C metamorphic D sedimentary
17 A rock is observed to be very dense with alternating, parallel bands of light and dark crystals. This rock is most likely a __________ rock.
A extrusive igneous B intrusive igneous C metamorphic D sedimentary
18 Which type of rock occurs when magma cools and hardens beneath the surface?
A metamorphic B sedimentary C igneous D limestone
19 Which of the following are the three major types of rocks?
A metamorphic, intrusive, extrusive B sedimentary, metamorphic, granite
C igneous, metamorphic, pumice D igneous, metamorphic, sedimentary
20 In which area is basalt rock most commonly formed?
A deep ocean trenches B at the edges of a transform boundary C underground where magma cools rapidly
D in areas of sea–floor spreading
EC question
How long does it take Earth to revolve around the sun? Be very specific. Hint today



Feb 28
QFD: Forget not that the earth delights to feel your bare feet and the winds long to play with your hair. ~Kahlil Gibran
?FD: What color rocks come from non- explosive volcanoes? explosive?
ESS3e. Students know there are two kinds of volcanoes: one kind with violent eruptions producing steep slopes and the other kind with voluminous lava flows producing gentle slopes
1) continue vocabulary building exercise
2) READ – yesterdays lesson
3) section review questions
4) rocks/ video clips



Feb 27
Eruption demonstration
QFD: When we heal the earth, we heal ourselves. ~David Orr
?FD: Name the three major types of volcanoes
ESS3e. Students know there are two kinds of volcanoes: one kind with violent eruptions producing steep slopes and the other kind with voluminous lava flows producing gentle slopes
1) Students will write notes using a vocabulary worksheet and keep this document to study
2) Students will read out loud and be respectful of others while they are reading
3) Students will complete Section review page 181 qs 1-4 as HW
Notes
Volcano – a weak spot in the crust where molten material, or magma rises to the surface creating new rock and forming new islands
Magma is rock froming substances that includes gases and water vapor and becomes lava when it reaches the surface
Ring of Fire – the pacific plate which has the most active volcanoes on earth
Divergent plate boundary volcanoes – most of these are in the ocean below the surface except for Iceland and the Azores islands
Convergent Plate boundary volcanoes – Subduction causes oceanic crust to melt and form magma resulting in Island arcs (Japan, New Zealand, Philippines, and Aleutian islands)
Hot Spot Volcanoes – An area where magma melts through the crust in the middle of a plate (Hawaii, Yellowstone Park in Wyoming )
Igneous Rocks – Formed when magma cools ( Pumice and Obsidian are darker rocks)
Volcanic Eruptions – dissolved gases rush to the surface carrying magma which are either violent producing steep volcanoes or voluminous (runny) producing gentle sloped volcanoes
Volcanoes are composed of a magama chamber, a pipe, a vent, and a crater
SILICA – material that is formed when silcon and oxygen combine. The more silica magma, the thicker magma. High silica – light rocks, explosive steep volcanoes Low silica – dark rocks, non explosive, quiet eruptions producing gentle sloped volcanoes
Volcano stages – active = a live magma chamber dormant = sleeping magma chamber extinct – dead magma chamber
Geothermal areas – (hot springs, geysers) water is heated that is nearby magma and can be used to produce clean energy
Shield Volcanoes – gently sloped, non explosive volcanoes, quiet eruptions ( Mauna Loa)
Cinder Cone – steep, cone shaped, explosive volcanoes (Paricutin)
Composite Volcanoes – steep, alternating flowing lava, explosive ( Mt. Fuji, Mt. St. Helens)
Caldera – collapsed volcano creating a giant hole in surface of Earth (Crater lake, Oregon)
Lava Plateaus – thin, runny lava which form high flat plateaus (Washington, Oregon)
Volcanic Neck – hardened magma inside a volcanic pipe and softer rock wears away
Batholith – mass of rock formed when magma cools inside the crust forming an extinct volcano
Pyroclastic flow – an explosive eruption that hurls volcanic bombs, cinders and ash (most violent eruption)
Hot springs – groundwater is heated by nearby magma that rises to the surface ( desert hot springs)
Geyser – fountain of water and steam that erupts from the ground ( old faithful, yellowstone park)
Metamorphic Rocks – rocks that are changed from heat and pressure inside earth ( gemstones, quartz, etc)
sedimentary rocks – rocks that are formed from other rocks also include organic rocks ( coal, limestone amber, coral, petrified wood) and are compacted together

Volcano cams









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Responses

  1. To me Mr Borden honestly volcanoes have always reminded me even when i was a little girl ive seen volcanoes as acne of the earth much like acne on our faces haha its sortof forward but thats what i think of volcanoes the video was really cool

    • I agree, the Earth purges itself, like a face or others gaseous area haha


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