Pangaea
Moves slowly everyday
What is Earth's surface?
Page 217
An explanation as to why and how continents move
What is the theory of seafloor spreading?
Page 227
Sediment thickness also increases with ______ away from the mid-ocean ridge
What is distance?
Page 229
An example of a transform plate boundary
What is the San Andreas Fault?
Page 236
Rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force called
What is ridge push?
page 239
A supercontinent formed by all of Earth continents
What is Pangaea?
page 217
When magma erupts onto Earth's surface it is called
What is lava?
Page 226
A state in which magnetized objects, such as compass needles, will orient themselves to point north
What is normal polarity?
Page 228
A boundary that forms when two plates separate
What is a divergent plate boundary?
Page 235
The circulation of material caused by differences in temperature and density
What is convection?
Page 238
A theory suggesting that all continents on Earth's surface are in constant motion
What is continental drift?
Page 217
A process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
What is seafloor spreading?
Page 226
When this occurs the magnetic field switches directions
What is magnetic reversal?
Page 228
A boundary that forms when two plates slide past each other
What is a transform plate boundary?
Page 235
Causes rocks and other materials to expand and lose density
What does heat do?
Page 238
A German scientist who investigation the drifting of Earth's continents
Who is Alfred Wegener?
Page 217
The closer the crust is to a mid-ocean ridge the _____ the ocean crust is
What is younger?
Page 226
A state in which magnetized objects would switch around to orient themselves facing south
What is reversed polarity?
Page 228
A landform created by convergent plate boundaries
What is a mountain?
Page 236
These currents in the asthenosphere act like a conveyor belt moving the lithosphere above
What is a convection current?
Page 238
Africa and _____ have coastlines that fit together like pieces to a puzzle
What is South America?
Page 217
A smooth layer of sediment on the seafloor
What is an Abyssal plain?
Page 227
A tool used to record the magnetic signatures of rocks
What is a magnetometer?
Page 229
Stress causes rocks to break and rapidly release energy
How does an Earthquake occur?
Page 235
As a slab sinks, it pulls on the rest of the plate with a force called
What is slab pull?
Page 239