Plate Tectonics
Two tectonic plates moving towards each other make a _______________
Convergent Boundary
Name the layers of the earth, in order from inside to outside
Core, Mantle, Crust
Describe the theory of continental drift!
The theory that explains the gradual movement of the continents across the earth's surface over time.
What date is our next PD Day?
April 4th
Our classroom room number.
308
Tectonic plates interact at places called plate ___________.
boundaries
The inner core is solid, true or false?
true
What two continents fit together like a jigsaw puzzle, and are used as a source of evidence of plate tectonics
South America and Africa
This landmark is evidence that subduction is occuring
An ocean trench
What types of plates must converge for subduction to occur?
An Oceanic and a Continental Plate converging
What two types of plates are there?
Continental Plates(Land on top)
and
Oceanic Plates(Ocean/Water on top)
Heat from the Earth's core heats up rock which becomes less dense and rises to the surface. After it cools it falls back down again. What is this called?
Convection cycle
When all continents were together they formed a single giant landmass called??
Pangaea
The process where one plate slides under another overriding plate, and back into the mantle is called...
Subduction
When an oceanic plate runs into a continental plate, what types of geological landmarks are formed?
Name two!
Trench
Mountain Range on Land
Volcanoes on Land
(Also earthquakes occur)
When two continental plates converge (convergent boundary) they form the following landmark
Mountains and Mountain Ranges!
Why does rock rise when it is heated, and fall when it is cooled?
Rock rises when it is heated because it becomes less dense, and less dense materials rise(hot air balloon).
More dense material sinks(metal in water)
If hot materials didnt rise, would the continents still move? Why or why not?
They would not! Convection causes seafloor spreading and subduction which moves the plates like luggage on conveyor belt.
Describe what causes seafloor spreading?
Convection in the mantle pushes magma to the surface, which hardens and forms new crust on the seafloor
The theory that Earth's crust and top part of its mantle are broken up into different sections that move and interact with each other is called?
Theory of Plate Tectonics
What kind of geological landmarks does the following plate boundary create?
(Image 1)
Divergent boundary creates
1) mid-ocean ridge
2)underwater mountain range
3)underwater volcanoes
When magma rises to the surface in the ocean, what does it create?
New crust
Give three pieces of evidence for Continental Drift!
1) Matching Animal and Plant Fossils that couldnt swim in different continents
2) Africa and North America Fit like jigsaw puzzle
3) Matching Mountain Ranges in different continents
4) Matching Coal Fields in different continents
What is one of the two processes that cause continents to drift?
Or what is the underlying cause of these two processes?
1) Seafloor Spreading
2) Subduction
Both are caused by convection in the mantle!
The Ring of Fire in the Pacific is an area with many volcanoes and earthquakes. Why are there so many of these in this area?
Because it goes along a plate boundary!