Question: What Drives The Slow Movement Of The Plates And The Convection In The Mantle?

What are the 3 causes of plate movement?

Mantle convection currents, ridge push and slab pull are three of the forces that have been proposed as the main drivers of plate movement (based on What drives the plates?.

What happens when plates move towards each other?

When oceanic or continental plates slide past each other in opposite directions, or move in the same direction but at different speeds, a transform fault boundary is formed. No new crust is created or subducted, and no volcanoes form, but earthquakes occur along the fault.

How do convection currents affect weather?

Atmospheric Pressure and Winds The heating of the Earth’s surface and atmosphere by the sun drives convection within the atmosphere and ocean. This convection produces winds and ocean currents. The greater the pressure differences between a low-pressure area and a high-pressure area, the stronger the winds.

What would happen if mantle convection stopped?

Answer 1: If all convection currents on Earth stopped that would be a natural disaster. The amount of heat which the sun radiates at us sets the temperature of the Earth’s surface. … So if convection completely stopped the high and low temperatures would force people and animals to move away from the poles and equator.

How do convection currents cause plates to move?

Hot liquid or gas near the heat source becomes hotter and less dense, so moves upwards. … The core heats up the magma and causes a convection current. When magma comes to the top of the mantle, it pushes against tectonic plates, which are huge slabs of rock which the crust rests on.

What is the process of convection currents?

Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.

What drives plate movement in the mantle?

Mantle convection currents, ridge push and slab pull are three of the forces that have been proposed as the main drivers of plate movement (based on What drives the plates? … slab pull — older, colder plates sink at subduction zones, because as they cool, they become more dense than the underlying mantle.

How and why do plates move?

Why do tectonic plates move? The main driving force of plate tectonics is gravity. If a plate with oceanic lithosphere meets another plate, the dense oceanic lithosphere dives beneath the other plate and sinks into the mantle. This process is called subduction.

What are the 4 types of plate movement?

There are four types of plate boundaries: Divergent boundaries — where new crust is generated as the plates pull away from each other. Convergent boundaries — where crust is destroyed as one plate dives under another. Divergent boundaries: where new crust is generated as the plates pull away from each other.

What is the process of convection in the mantle?

Mantle convection is the very slow creeping motion of Earth’s solid silicate mantle caused by convection currents carrying heat from the interior to the planet’s surface. … This hot added material cools down by conduction and convection of heat.

How does mantle convection relate to plate movement?

Geologists have hypothesized that the movement of tectonic plates is related to convection currents in the earth’s mantle. … Magma is the molten rock below the crust, in the mantle. Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents.

How fast do tectonic plates move?

They move at a rate of one to two inches (three to five centimeters) per year.

What is convection within the mantle responsible for?

The mantle’s convective motions break the lithosphere into plates and move them around the surface of the planet. … Tectonic plates break apart and diverge where the mantle beneath is upwelling. In such regions mid-ocean ridges develop, and new lithosphere and crust form to replace the material that is moving away.

What facilitates the movement of the plates?

The force that causes most of the plate movement is thermal convection, where heat from the Earth’s interior causes currents of hot rising magma and cooler sinking magma to flow, moving the plates of the crust along with them.