Tectoics EQ1 Flashcards
What are the 4 different sections of the earth?
- crust
- Mantle
- outer core
- inner core
Name a feature of the crust?
- 400 degrees
- less dense
- solid
- made of granite and basalt
What’s a feature of the mantle?
- 870 degrees
- less dense to medium dense
- liquid and solid
- 2 different types of material
What’s a feature of the outer core?
- 4400 to 6100 degrees
- dense
- liquid and solid
- sulphur and iron
What’s a feature of the inner core?
- 7000 degrees
- very dense
- solid
- Nickel and iron
What’s an intraplate earthquake?
Occurs in the interior of a tectonic plate
What’s a interplate earthquake?
Occurs at a plate boundary
Define hot spots
Occur in the middle of a plate created by plumes of magma
What is the plate boundary song?
Divergent is when two plates move apart from each other, magma rises and forms a new crust a shield volcano as a cover
Destructive always involves oceanic and continental, as they collide, oceanic sub-ducts, resulting activity’s mental
When two plates move at different speeds it forms a conservative boundary pressure builds inside the fault then releases a lot of energy
The meeting of two continental plates forms a boundary called collision l, neither subducts a mountain is formed this is our song for revision
what are the two factors that plate boundray type depends on?
motion
plate type
what are mantle plumes?
isolated plumes convecting heat
how much do the Earth’s tectonic plates move every year
2-5 cm
what is the theory of plate tectonics?
FIND OUT
what is Alfred Wegener’s Continental drift hypothesis
now separate continents had once been joined
What were Arthur Holmes’ ideas?
the Earth’s internal; radioactive heat was the driving force of mantle convection that could move tectonic plates
