Plate Tectonics
Under the Sea
Wegener
Boundaries
Vocabulary
100
This constant motion causes the plates to move
What is Convection Currents
100
The adding of new material to the ocean floor?
What is Sea-Floor Spreading
100
The name Wegener game to the super-continent that existed 300 million years ago?
What is Pangea
100
The type of boundary where plates collide (scientific term, please)
What is Convergent Boundaries
100
Earthquakes produce these types of waves
What are Seismic Waves
200
Breaks in the Earth's crust
What are Faults
200
In the mid-1900s, scientists mapped the ocean floor using this?
What is Sonar
200
Term for an ancient organism that has been preserved in rock?
What is Fossil
200
The type of boundary where plates separate (scientific term, please)
What is Divergent Boundaries
200
Rigid, slowly moving pieces of Earth's surface
What are tectonic plates
300
Two continental plates colliding or converging will create this type of landform?
What are Mountains
300
During subduction, the ocean floor sinks back into the mantle creating these underwater canyons?
What are Deep-Ocean Trenches
300
Wegener's hypothesis was rejected because he could not prove this...
What is How the Plates moves
300
The type of boundary where plates slide past each other (scientific term, please)
What is Transform Boundaries
300
The theory that all continents are fragments of Pangaea now drifting apart
What is Continental Drift Theory
400
Transform boundaries usually cause these (especially in California)
What are Earthquakes
400
The 3 types of evidence for sea-floor spreading are molten material, rock drilling, and this?
What is Magnetic Stripes
400
Term for the continents slow movement on Earth's surface
What is Continental Drift
400
Two land plates separating or spreading apart will create this...
What is a Rift Valley
400
States that the ocean floor moves outward from mid-ocean ridges (like a conveyor belt)
What is Sea-Floor Spreading
500
Describe the two types of convergent boundaries
What is 1. subduction (where volcanoes often occur) and 2. collision (where mountains are usually formed)
500
The youngest rocks of ocean floor are found here...
What are Mid-Ocean Ridges
500
Scratches in South African rocks caused by glaciers is proof of this type of evidence
What is Ancient Climatic Zones
500
The movement of plates causes Earth's surface to change. Name at least 3 types of changes caused to Earth's surface.
What is Earthquakes, volcanoes, mountain ranges, deep-ocean trenches
500
Although the hottest layer of the Earth, this layer is solid metal (MUST be specific)
What is the Inner Core
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