Show:
Where are the Volcanoes?
Types of volcanoes
Reading Maps
Volcanic Products
Forecasting Volcanoes
100
This is the name of the continous mountain range found in the Earth's ocean basin.
What is the mid ocean ridge?
100
This creates the difference between Hawaiian and Cascade (Mt. St. Helens).
What is more silica in the Cascade volcanoes?
100
This connects points of equal elevation.
What is a countour line?
100
This results from melted ice and snow after an eruption.
What is a lahar or mud flow?
100
This best describes the global distribution of volcanoes. (focus on tectonic plates)
What is mostly occur along plate boundaries?
200
This is the name for naturally occurring molten rock generated within the Earth.
What is lava or magma?
200
This happens as lava's viscosity as it cools.
What is becomes more viscous?
200
This is the elevation gain when going from one countour line to the next.
What is a countour interval?
200
This is the type of rock that results from magma or lava cooling and solidifying.
What is igneous rock?
200
This external evidence indicates that a reservoir in a volcano is being fed with magma prior to an eruption. (focus on the slopes of volcano)
What is steepening of the slopes?
300
This is the cause of most volcanoes found on land. (focus on plate interactions)
What is plate moving together or apart?
300
This type of magma causes volcanoes to explode violently.
What is high silica content magma?
300
This affects towns the furthest away from a volcano.
What is ash?
300
This type of tephra would fall the closest to eruption site.
What is a volcanic bomb?
300
This happens to the amount of gas in magma when magma from beneath Earth’s surface erupts as a volcano.
What is the amount of dissolved gas decreases?
400
This is the difference between lava and magma.
What is lava is molten rock found above ground and magma is molten rock found below ground?
400
This type of volcano is tall with steep slopes and has magma of high-silica content.
What is a composite volcano.
400
This is how you can tell a slope is getting steeper on a contour map.
What is the contour lines are closer together?
400
This is the name for a device that can detect very small changes in surface slope elevation.
What is a tiltmeter?
400
This causes the small crystals that we see in extrusive igneous rocks.
What is the fast cooling of extrusive rocks results in smaller crystals?
500
This ring of volcanoes surrounds the Pacific Ocean.
What is the Ring of Fire?
500
This type of volcano is associated with low-silica magma and eruptions from a single vent or closely-spaced vents.
What is a shield volcano?
500
This affects the direction and distance that ash can travel.
What is wind?
500
This type of gas is denser than air and is dangerous to animals near a volcano.
What is carbon dioxide?
500
This is what can happen as a result of volcanic eruption to the climate of the Earth.
What is some volcanic products affect global cooling, others affect global warming?