The Mechanics of Plate Movements (Grade 10 NSC Matric Geography): Quizzes
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10 questions from this quiz
What is the main driving force behind tectonic plate movement?
What is the main driving force behind tectonic plate movement?
Convection currents in the mantle
What happens to mantle material when it heats up near Earth's core?
What happens to mantle material when it heats up near Earth's core?
It becomes less dense and rises
What are ridges in plate tectonics?
What are ridges in plate tectonics?
Underwater mountains where new crust forms
What is the process called when new oceanic crust forms at ridges?
What is the process called when new oceanic crust forms at ridges?
Seafloor spreading
What happens at subduction zones?
What happens at subduction zones?
Oceanic plates slide under continental
What are trenches in the context of plate tectonics?
What are trenches in the context of plate tectonics?
Deep cracks where oceanic plate descends
What is the original source of heat that drives convection currents in the mantle?
What is the original source of heat that drives convection currents in the mantle?
Earth's core
How do convection currents move the tectonic plates above them?
How do convection currents move the tectonic plates above them?
They drag plates like conveyor belts
Why is the plate movement system self-sustaining?
Why is the plate movement system self-sustaining?
Earth's core continues to provide heat
What maintains Earth's overall size despite new crust being created?
What maintains Earth's overall size despite new crust being created?
Creation & destruction balance at zones