Tremendous heat and pressure within the earth cause the hot magma to flow in
What force causes the movement of Earth’s plates quizlet?
Convection currents in the mantle is the force that caused the movement of the plates that carry the continents.
What are the 3 causes of plate movement?
What are three causes of plate movement? Mantle dynamics, gravity, and Earth’s rotation taken altogether causes the plate movements. However, convectional currents are the general thought for the motion.
What is ridge push force?
Gravitational force that causes a plate to move away from the crest of an ocean ridge, and into a subduction zone. It works together with Slab Pull, but is much less significant.
What is the movement of ridge?
Ridge push (also known as gravitational sliding) or sliding plate force is a proposed driving force for plate motion in plate tectonics that occurs at mid-ocean ridges as the result of the rigid lithosphere sliding down the hot, raised asthenosphere below mid-ocean ridges.
How does ridge push cause plate movements?
Ridge push –magma rises as the plates move apart. The magma cools to form new plate material. As it cools It becomes denser and slides down away from the ridge. This causes other plates to move away from each other.
What is the process of the ridge push that causes plates to move?
As the lithosphere formed at divergent plate margins is hot, and less dense than the surrounding area it rises to form oceanic ridges. The newly-formed plates slide sideways off these high areas, pushing the plate in front of them resulting in a ridge-push mechanism.
How do driving forces and resisting forces affect plate movement?
“slab pull” As lithospheric plates move away from midocean ridges they cool and become denser. … This helps to pull the rest of the plate down with it. resisting forces The main effect of the underlying mantle is to produce a shearing or frictional force resisting the motion of lithospheric plates.
What kind of force resist plate movement away from the center?
Between two off-set spreading centres, the plates move past one another forming transform faults. Since the direction of movement is opposite, drage forces are establishd between these sections of the plate. This drag force resists plate movement away from the spreading centre.
What are the 3 different possible causes of plate movement How do they differ from each other?
The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways in relation to each other.
What causes plates to move geography?
So how do convection currents cause plate movements? As the semi-molten rock in the mantle is heated it becomes less dense than its surroundings and rises. As it reaches the crust above, it spreads out carrying the plates above with it.
What force drives ridge push and slab pull?
‘Ridge Push’ and ‘Slab Pull’ are thought to be the major forces driving the motion of oceanic plates. Ridge push is caused by the potential energy gradient from the high topography of the ridges. Slab pull is caused by the negative buoyancy of the subducting plate.
How is mantle convection responsible for the movement of tectonic plates What do ridge push and slab pull have to do with the process?
Seafloor Spreading at Mid-Ocean Ridges. Convection currents drive the movement of Earth’s rigid tectonic plates in the planet’s fluid molten mantle. In places where convection currents rise up towards the crust’s surface, tectonic plates move away from each other in a process known as seafloor spreading (Fig.
How do plates move?
Plate tectonics move because they are carried along by convection currents in the upper mantle of the planet (the mantle is a slowly flowing layer of rock just below Earth’s crust). Hot rock just below the surface rises and when it cools and gets heavy, it sinks again.
What happens when plates move?
When the plates move they collide or spread apart allowing the very hot molten material called lava to escape from the mantle. When collisions occur they produce mountains, deep underwater valleys called trenches, and volcanoes. … The Earth is producing “new” crust where two plates are diverging or spreading apart.
What is a resisting force?
A resistive force is one that inhibits or resists the motion of an object. It acts in a direction opposite of any motion or applied force that is trying to move the object. … The most common resistive force is friction, where an object is held back from sliding across a surface.
Is drag force a driving force of tectonic plates?
The motion of tectonic plates is driven by convection in the mantle. … viscous drag: the force opposing motion of the plate and slab past the viscous mantle underneath or on the side.
What are the four resisting forces?
Normal force, exerted reactionally back on the acting body by the compressive, tensile or shear stress within the recipient body. Intermolecular forces, when separating adhesively bonded surfaces. Magnetic repulsion, when a magnetic object moves against another magnetic field. Gravity, during vertical takeoff.
How does convection cause the motion of plates that drives plate tectonics quizlet?
Part of the mantle consists of the molten material that circulates in convection currents beneath the earths crust. This process drives plate tectonics. the transfer of thermal energy (heat) from the core by the circulation or movement of Mantle material. Believed to be the driving force of plate tectonics.
What causes tectonic plates to move and what evidence do we have that they have done so?
What causes tectonic plates to move, and what evidence do we have that they have done so? Plate tectonics move by mantle convection currents. Rock formations and fossils are evidence.
What do constructive plates cause?
At a constructive plate margin the plates move apart from one another. When this happens the magma from the mantle rises up to make (or construct) new land in the form of a shield volcano. The movement of the plates over the mantle can cause earthquakes.
Why do tectonic plates move quizlet?
convection currents are a process in which the materials inside the mantle heat up and rise to the surface whilst the cooler liquid sinks; as it sinks it then heats up and rises again. This continuous cycle is established: hot liquid rising, cold liquid descending. These currents cause the tectonic plates to move.
What causes constructive plate boundaries?
At constructive plate boundaries, the tectonic plates are moving away from one another. The Earth’s crust is pulled apart to create a new pathway for rising hot magma to flow on to the surface. … As the plates pull apart, molten rock (magma) rises up and erupts as lava, creating new ocean crust.
Which causes the convection current in the Earth’s mantle?
It is caused by the difference in temperature and density. … Heating and cooling of the fluid, changes in the fluid density, and the force of gravity, combine to set convection currents in motion. Heat from the core and the mantle itself cause convection currents in the mantle.
How do convection currents create the force to move tectonic plates?
Heat rising and falling inside the mantle creates convection currents generated by radioactive decay in the core. The convection currents move the plates. Where convection currents diverge near the Earth’s crust, plates move apart. Where convection currents converge, plates move towards each other.