Plate Movement
Which layer has tectonic plates?
The crust.
The scientist responsible for introducing Continental Drift Theory.
Alfred Wegener
The point at which tectonic plates collide into each other
convergent boundary
An increase in temperature will cause an item to become _______________dense.
less
Earthquakes cause tectonic plates to move. True or false?
FALSE!!!!
Which layer does the crust floats on that is made of a thick layer of magma which allows for plate movement?
Mantle.
The super-continent that was once a giant land mass and separated into the continents we have today.
Pangaea
The point at which tectonic plates separate from each other
divergent boundary
What is the density of water?
1.0 g/mL
What is the name of the scientist that is credited with discovering sea floor spreading?
Harry Hess
What is the heat source that allows for the magma in the mantle to heat up and move the plates?
The core.
The crust may also be known as
Lithosphere or tectonic plate
Which plate boundary is responsible for most of the earthquakes?
Transform Boundary
Which has a greater density, an oceanic plate or a continental plate?
oceanic plate
When Pangaea split into two different landmasses, what were the two land masses called?
Laurasia and Gonwanaland
What is it called when hot magma rises and cool magma sinks in a cyclical manner?
convection
Four kinds of evidence used by Scientist to support Pangaea existed.
plant & animal fossils
observe that continents fit like puzzle
Landforms/mountain building
Glaciers (striations)
Name the two place (or 2 types of crusts) tectonic plates meet to make mountains.
oceanic meets continental
continental meets continental
What determines which plate will subduct when two plates are colliding together?
The more dense plate will subduct under the other plate.
Process that continually adds new sea floor
Sea-floor spreading.
What plate movement causes mid-ocean ridges?
Divergent Boundary
What was the reason that the Continental Drift Theory was not accepted?
convection currents moving the plates
Name and describe the three different types of boundaries
divergent - pull apart
convergent - push together
transform - slide past
The colder an item gets the item will gain ____________.
density
The place/feature where molten material rises from the mantle and erupts, spreads out, and pushes old crust to the sides
Mid-ocean ridge