The Global Distribution of Volcanoes Guided Cornell Notes Questions, pp G7-G11
What information does the USGS map “This Dynamic Planet” show?
How many volcanoes erupt each year on Earth?
*)Where are volcanoes common?
Infer what volcanic rocks on the floor of the ocean indicate.
*)Define mid-ocean ridge.
How long, in total, are the mid-ocean ridges?
How deep are the mid-ocean ridges?
*)Define rift-valley.
Define magma.
*)Where does magma rise up? What does it form?
How do scientists know that volcanoes exist under water?
The entire ocean floor, beneath a thin layer of sediments, is composed of what?
*)Illustrate a cross-section through a mid-ocean ridge (Figure 1).
Are volcanoes on land more or less dangerous than volcanoes under the ocean? Why do
you think?
*)What do geologists call the narrow band of volcanoes all around the Pacific Ocean?
Cite a famous example of an eruption along the Ring of Fire.
*What is happening around the edges of the Pacific Ocean Plate?
Cite an example of a plate that slides beneath a continent.
Describe what happens when one plate slides beneath another.
Where do 4/5s of the volcanoes on land form?
Where do volcanoes occur where two part of the same continent are moving apart from
each other?
*)Illustrate a rift valley (Figure 3).
Where in the United States is there a rift valley?
Cite an example of a volcano in the interior of a plate.
*)Define hot spot.
What can scientists infer about the age of the islands in Hawaii, from the studies of
volcanic rocks?
In what direction is the Pacific Plate moving?
As the Pacific plate moves northwest, what does it form?
Define seamounts.
Define map projections.
Define Mercator Projection.
Objectives:
Make inferences about possible locations of future volcanic activity.
Understand that most volcanism occurs beneath the ocean.
Understand map projections distort regions near the poles and eliminate data.