Mantle Convection
What actually moves during mantle convection?
Rocks from the Earth's mantle move in a slow, circular cycle.
What is a convergent plate boundary?
A convergent plate boundary is a location where two or more tectonic plates move toward each other and collide.
At what type of plate boundary do mountains and volcanoes often form?
Convergent Boundary
Is the Sea Floor a completely flat surface?
(Yes, it is a completely flat surface or No, the depth of the ocean changes)
No, the depth of the ocean changes
The inner core is as hot as...
the surface of the sun
What heats up the bottom of the mantle?
The core of the Earth
What is a divergent plate boundary?
A divergent plate boundary is a location where two tectonic plates move away from each other or separate.
What was the name of the supercontinent predicted to have broken apart?
Pangea
Where is the deepest part of the ocean?
The Mariana trench
Mantle convection moves at a rate of a few centimeters per year, which is about the same speed as...
your fingernails grow
What happens to mantle rock when it gets hot near the core?
The matter spreads apart, becomes less dense (lighter), and rises toward the Earth's crust.
What is a transform plate boundary?
A transform plate boundary is a location where two tectonic plates slide horizontally past one another.
What is created when two pieces of continental crust collide?
Mountains
Which is more dense: Continental or Oceanic Crust?
Oceanic crust
Which type of scientist would excavate fossils and study extinct organisms?
Paleontologist
What happens when the hot mantle material reaches the top near the crust?
It cools down, becomes more dense (heavier), and sinks back down toward the core to be heated again.
Who discovered the theory of continental drift?
Alfred Wegener
Seafloor spreading occurs at which type of plate boundary?
Divergent Boundary
What is the name of the liquid rock inside a volcano?
Magma. (Once it flows out, it is called lava!)
Which type of scientist would study earth’s landforms and structures.
Geologist
This region can be compared to hot tar; it is located in the cooler upper mantle.
Asthenosphere
The ____________ is broken up into pieces called Tectonic Plates.
Lithosphere
What do transform boundaries create?
Earthquakes
What is it called when one plate moves below the other?
Subduction
What is the horseshoe-shaped area around the Pacific Ocean where most of the world's volcanoes are located?
The Ring of Fire