Intrusive rocks are formed beneath the earth's surface and extrusive igneous rocks are formed beneath the earth's surface but cool quicken than intrusive igneous rocks<span />
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Buoyant force A. acts in the upward direction.
If the Buoyant force is greater than the gravitational force (as seen in ducks), they will stay floated
If the Buoyant force is less than the gravitational force (for example, a leaking ship) the ship would sink.
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