Seafloor Spreading
Magnetic Reversal
Plate Motion and Effects
Faults and the Types of Stress
Hot Spots
Plates and Plate Movement
Plates and Plate Movement
100
what causes seafloor spreading?
divergent boundary (oceanic-oceanic)
100
When looking at the magnetic of the sea floor you are able to see that...
Earth's magnetic field reverses in unpredictable patterns
100
subduction, trenches, earthquakes, volcanoes, mountains are caused by what boundary
convergent
100
what fault is this showing?
normal
100
plates collide creating mountains is called a
convergent boundary
200
is sea floor spreading consistent at all mid-ocean ridges?
no
200
Is the change of the magnetic field predictable, true or false?
False
200
rift valleys, earthquakes, mid-ocean ridges, volcanoes are caused by what boundary
divergent
200
what stress is this showing?
tension
200
plates slide horizontally past one another is called a
transform boundary
300
What is up welling in the mid-ocean ridges that causes sea-floor spreading?
magma
300
How many times had earth's magnetic field change in the last 20 years?
60 times
300
earthquakes are caused by what boundary?
transform
300
what fault is this showing?
reverse
300
Is a island far from a hot spot older or younger?
older
400
Is the formation of sea floor spreading new or old?
new
400
Is the earth's magnetic field normal or reversed right now?
Normal
400
When a divergent plate makes an undersea mountain chain where new ocean floor is produced its called a
mid-ocean ridge
400
what stress is shown?
shearing
400
what is an area where magma from deep within the mantle melts through the crust above it
a hot spot
500
A depression of Earth's surface in which an ocean lies is called the
Ocean Basin
500
what is the name of the geologist who made a discovery about Earth's magnetic filed?
Bernard Brunhes
500
what is a deep valley that forms where two plates move apart?
rift valley
500
what type of fault is shown?
strike slip
500
A well-known hot spot in the continental lithosphere
Yellowstone