Lesson 1
Evidence of Plate Motions
Evidence of Plate Motions
The theory that Alfred Wegener developed.
For help see pg. 157
What is Continental Drift?
Hypothesis where all the continents had once been fused together, and that over time they had drifted apart.
This theory states that the crust and upper part of the mantle is broken up into distinct plates. This plates are in slow, constant motion.
See pg. 167
What is the theory of plate tectonics?
The force that acts on rock to change its shape or volume.
See pg. 179
What is stress?
A structure that forms in the Earth's crust when molten material called magma reaches the Earth's surface.
See pg. 191
What is a volcano?
The evidence that supports the Continental Drift theory.
See pg. 158-159
What is land features, fossils and climate?
This process is responsible for moving the continents great distances across the Earth's surface.
See pg. 168
What are convection currents?
A break in the rock of Earth's crust or mantle.
See pg. 180
What is a fault?
The location where plates move apart and rock rises to fill the vacant space and form a volcano.
What is divergent boundary?
Zipper-like chains of undersea mountains.
see pg. 160
What are mid-ocean ridges?
Area around the Pacific Ocean that is prone to volcanic activity and earthquakes.
See pg. 170
What is the Rign of Fire?
Stress builds up until the plates lurch into motion, releasing a great amount of energy.
See pg. 183
What is an Earthquake?
Area where lava frequently erupts at the surface, independent of a plate boundary
See pg. 193
What is a hot spot?
The entire floor on either side of ocean ridge moves away when molten rock flows through a crack in Earth's crust and hardens, meaning the older strips of rock moves father from the ridge over time.
see pg. 161
What is sea-floor spreading?
The three types of interactions Earth's plates have when they meet at boundaries.
See pg. 171
What are divergent boundary, convergent boundary, and transform boundary?
The types of seismic waves.
The type of volcano that erupts and collapses inward.
What is a caldera?
The sinking movement of ocean floor back into the mantle when a plate of oceanic crust is adjacent to the Earth's crust.
What is subduction?
The Himalayas were a result of this kind of boundary.
What is Convergent boundary?
The causes for tsunamis.
What is ocean floor uplift and landslides?
The name of the two volcanos from the videos posted in Google Classroom.
What are Mt. Kilauea and Krakatau?