Science 10 Enriched:
Chapter 12.2 Features of plate tectonics
Layers of the earth.
What is the diameter of the earth? _____________________________________
Describe the four distinct layers of the earth.
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What is the difference between the lithosphere and the asthenosphere?
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Are tectonic plates part of the lithosphere or the asthenosphere? _______________________
What keeps the lithosphere molten?
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Continents, attached to the tectonic plates, float in the magma of the asthenosphere.
 As magma is heated in the asthenosphere, convection currents form.
 Rising magma can reach the surface at ridges (in the oceans) or rifts (on land).
 What is ‘ridge push’?
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 Tectonic plates are all moving at the same time.
 How many large plates are there? _____________
 What is subduction and what kind of disturbances does it cause?
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What is a plate boundary? ________________________________________________________
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Differetiate between divergent, convergent and transform plate boundaries and provide examples
of where these occur on earth!
1. Divergent plate boundaries:
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2. Convergent plate boundaries:
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a. Oceanic-continental plate convergence.
The convergence of an oceanic and a continental plate
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The oceanic plate subducts under the continental plate, forming a trench.
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Cone-shaped volcanoes can form from magma seeping to the surface.
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This is how the volcanic belt of the North America’s west coast has
formed.
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Mountain ranges like the Coast Mountain range also form from the
collision.
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Science 10: 12.2
Earthquakes can occur when subduction, ridge push, and slab pull stall.
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b.
Oceanic-oceanic plate convergence
How does this occur and where has it occurred on our earth?
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c. Continental-continental plate convergence
How does this occur and where has it occurred on our earth?
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3. Transform plate boundaries: What are they and where do they occur?
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What accounts for 95 percent of all earthquakes?
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What is the difference between the focus and the epicenter of an earthquake?
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What are seismic waves?
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Create a table to highlight the difference between primary, secondary and surface waves.
What is a seismometer?
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How much stronger is a magnitude 6 earthquake that a magnitude 5 earthquake?
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A magnitude 9 earthquake that a magnitude 5 earthquake? ___________________
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VOLCANOES
Explain the difference between:
Composite Volcanoes
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Shield volcanoes
http://en.wikipedia.org/wiki/Shield_volcano
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Rift eruptions
http://hvo.wr.usgs.gov/kilauea/update/archive/update971231.html
Complete all textbook review and workbook questions.
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