Vocab
The crust and upper portion of the mantle
Lithosphere
Alfred Wegner proposed that all the continents were once part of a super continent called
Pangea
The youngest part of the ocean floor is found
At ocean ridges
________ currents inside Earth might drive plate motion
Convection
Most earthquakes and volcanic activity on Earth occur at plate boundaries
True
The energy of an earthqake
The hypothesis that continents have slowly moved to their current locations is called
Continental drift
Plates of the lithosphere float on the
Asthenospehre
What is formed when two continental plates collide and one plate is forced beneath the other
Volcano
What happens at transform plate boundaries
Earthquakes
Earth's surface is divided into rigid plates that move relative to one another
Plate tectonics
Continental drift was not widely accepted when it was first proposed because
Wegner couldn't explain what force could move a continent
Plates move apart at ______ plate boundaries
Divergent
Scientist use _______ to track tectonic plate movement
GPS
What happens at divergent plate boundaries
Seafloor spreading
The point on Earth's surface directly above the location where the earthquake occured
Epicenter
Seafloor spreading occurs because
Molten material beneath Earth's crust rises through divergent plates to the surface
Plates move together at __________ plate boundaries
Convergent
True or False
Plate tectonics explains the formation of Earth's features such as mountains, valleys and ridges
True
Whee have the most earthquakes occurred in the United States
California and Alaska
Seismic waves
Alternating
Transform
True or False
The magnitude of an earthquake is a good indicator of how much damage will occur
False
Who is your favorite science and social studies teacher
Mr. B!!!!!!