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How does convection current in the mantle cause the plates to move?
• The materials in the mantle are heated by the high temperature in the core.
• The heated materials becomes less dense and rise to the earth surface
• It spreads out below the crust and drags the plates above it, to move away from each other (divergent plates).
• The semi-molten rock cools, becomes denser and sinks towards the mantle and cause the plates above it, to move towards each other (convergent plates).
• The process continues and the convection current in the mantle causes the plates to move.
Watch this video on Plate Tectonics
https://maggiesscienceconnection.weebly.com/layers-of-the-earth.html
Look at the diagrams which show what happened at the plate boundaries and hot spot.
More on types of plate boundaries: https://earthhow.com/plate-tectonics-types-divergent-convergent-transform-plates/
Update - look at the birth of a volcanic island in South Pacific - http://www.anonews.co/boat-crew-island/
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