plate tectonics 1
What is the name of the theory that explains how Earth's plates move?
What is Plate Tectonics?
What type of plate boundary causes earthquakes?
What is a transform boundary?
The Earth's crust is broken into large pieces called ______.
plates
True or False: The Earth has 3 tectonic plates.
false
The supercontinent from millions of years ago.
What is Pangaea?
What layer of the Earth do tectonic plates float on?
what is mantle?
What forms when an oceanic plate sinks under a continental plate?
What is a trench or subduction zone?
The soft, flowing layer beneath the plates is called the ________.
asthenosphere
True or False: Volcanoes often form near plate boundaries.
true
The scientist who first suggested continental drift.
Who is Alfred Wegener?
What is the name of the place where two plates meet?
What is a plate boundary?
What do we call the process where new crust forms at mid ocean ridges? (What is seafloor spreading?)
What is seafloor spreading?
Earthquakes are caused by the sudden movement of ______.
tectonic plates
True or False: Plates move because of gravity and convection currents
true
The theory that explains how continents move.
What is the theory of plate tectonics?
What type of boundary causes mountains to form when plates push together?
What is a convergent boundary?
What boundary type creates mid ocean ridges?
What is a divergent boundary?
A ________ boundary is where plates move away from each other.
divergent
True or False: The Atlantic Ocean is getting smaller because of seafloor spreading.
false
The hot rising and sinking movement in the mantle.
What is convection (or convection currents)?
What large supercontinent existed about 300 million years ago?
What is Pangaea?
What is the name of the scientist who proposed the idea of continental drift?
Who is Alfred Wegener?
_________ drift was the earlier theory before plate tectonics.
continental
True or False: All tectonic plates move at the same speed.
false
This proves seafloor spreading found on both sides of mid-ocean ridges.
What are magnetic stripes (or magnetic reversals)?