Show:
Layers of the Earth I
Layers of the Earth II
Boundaries/PM I
Boundaries/PM II
Mid-ocean Ridge
100
Explain the composition of the inner core
It is solid iron and nickel
100
How is the most inner core solid when it is the hottest layer?
Because of the immense amount of heat and pressure it is under
100
Convection currents moving towards each other creates what kind of boundary?
A convergent boundary
100
What are the two types of crust?
Continental and oceanic
100
Where do mid-ocean ridges occur?
At divergent plate boundaries
200
What is the composition of the outer core?
It is liquid iron and nickel
200
The asthenosphere is responsible for what?
It is responsible for plate movement
200
Convection currents moving away from each other creates what kind of boundary?
Divergent boundaries
200
What happens when two plates with different density converge towards each other?
The denser plate moves beneath the less dense plate
200
How is new ocean floor generated?
At a mid-ocean ridge, lava generates new ocean floor
300
What causes convection currents?
Radiating heat and the rotation of the Earth
300
Where is the asthenosphere located
It is in the upper region of the mantle
300
How are transform boundaries caused?
When plates slide past each other
300
What happens when two plates of the same density converge towards each other?
They crumple upwards together causing mountains
300
What is the process of new seafloor being generated called?
Seafloor spreading
400
What moves the tectonic plates?
Convection currents
400
The act of the lithospheric rocks moving and sliding causes what?
Major geological features like volcanoes, lava flows, mountain building, deep crustal faults and rifts
400
What is to the left and right of a diverging convection current?
A converging convection current
400
Name two landforms that are caused at convergent boundaries?
Sample answer: volcanoes and mountains
400
Seafloor spreading produces long chains of what?
Volcanoes
500
Describe the movement of a convection current
Warm currents rise, cool, condense and fall back down
500
Where is the lithosphere located?
It is the crust and upper-most region of the mantle
500
What are two landforms that can be caused by a divergent boundary?
Sample answer: volcanoes and rift valleys
500
Name two landforms/processes that are caused by transform boundaries?
Sample answer: faults and earthquakes
500
Seafloor spreading occurs when what types of crusts are diverging?
Oceanic and oceanic