Volcanoes
How many types of volcanoes are there?
What is a focus of an earthquake?
The point below earth's surface where a rock breaks or slips and causes an earthquake.
Name the 3 types of plate boundaries.
Transform, Divergent, and Convergent
What is the name of the supercontinent that once made up our earth?
pangea
what is the mascot of blue valley north west?
huskies
What is the ring of fire?
an active volcanic region
True or false. Humans can feel every earthquake that happens.
false.
The plates float on top of the.....
asthenosphere
How many millions of years ago did the continents begin to move?
175
How far does the fastest plates shift in a year?
6 inches
Once magma leaves the vent of the volcano it is now called
lava
What is the name of the numerical value that represents the amount of energy released at the focus of an earthquake?
magnitude
Name the scientist that proposed that the lithosphere is broken into pieces called plates.
J. Tuzo Wilson
Why was Wegener’s hypothesis of a supercontinent that broke apart rejected by other scientists at the time?
He couldn't prove 'how' the continents moved
Seismic waves that move with a forward and backward motion are called:
p waves
What is the name of the material that 'runs off' the side of a volcano during an active explosion?
pyroclastic flow
______- waves are the most destructive.
L
A _______________ boundary occurs when two lithospheric plates slide past each other.
transform
3 of the main pieces of evidence for Sea-Floor Spreading is:
drilling samples, magnetic stripes and molten material
Which scientist's ideas about sea-floor spreading inspired a tremendous surge in scientific progress on the topic of plate tectonics?
Harry Hess
What is the name of low density basalt rock?
scoria
the energy of an earthquake is spread through earth's crust by.....
Seismic waves
The sinking of one lithospheric plate under another lithospheric plate is known as:
subduction
Name the 4 pieces of evidence that Wegener used to support his theory of continental drift
1. fossils
2. continental fit
3. glacial evidence
4. landforms and rock layers
is there more square footage of continental crust or oceanic crust?
oceanic