Question 10c Click submit to complete this assessment. Question 10 1 points Save

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Question 10c Click submit to complete this assessment. Question 10 1 points Save Answ What forces drive plate movement and which is the strongest? o Convection cels in the mantle (like bolling water moving things floating on the surface) is the only (and strongest) force moving the plates (called basal drag) o Ridge Push and Slab Pull are the only two forces driving plate movement and Ridge push is the strongest of the two. o Ridge Push, Siab Pull and Mantle Convection (Basal Drag) all drive plate motion, but Slab Pull s the strongest of the three. O Ridge Push, Slab Pull and Mantle Convection (Basal Drag)al dtrive plate motion, and Mantle Convection is the strongest of the three. Question 10 Click Submit to complete this assessment. Save and Subimi 0

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Ans.1

mantle convection was the main driving force - hot, less densematerial rises along mid-ocean ridges, cools, and subsides at subduction zones, and the plates "ride" these convection cells.Many geologists argue that the force of convection is not enough to push enormous lithospheric plates like the North American plate. They suggest instead that gravity is the main driving force: Cold, dense oceanic crustsinks at subduction zones, pulling the rest of the plate with it. According to this theory, magmatic intrusions at spreading ridges are passive - the magma merely fills a hole created by pulling two plates apart.Undoubtedly, gravity and convection both supply energy to keep plates moving.

Ans.2 -- (b)

A very small and very large ice cube floating in your drink sticks of different height.

Isostasy is the state of gravitational equilibrium between Earth's crust and mantle such that the crust "floats" at an elevation that depends on its thickness and density.

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