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I'm assuming you're talking about why a rock will sink into magma.
Almost any material in liquid form is less dense then in solid form. Water being the only substance, to my recollection, that does not follow this rule. So a rock is more dense then magma (liquid rocks) and will sink.
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoTwo reasons:
They are heavier, colder, and more dense than the surrounding material.
They are being forced under by the expansion of crust at rift zones.
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When rock in the mantle cools does it sink or rise?
When rock in mantle cools, it sinks. When rock in mantle heats, it rises.
Does cool air sink while warm air rises?
yes the cool denser air sink while the warm less dense rises
What happen to the crust when the molten rock sink to lower mantle?
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Why does cool rock materials sink when convection takes place in the mantle?
Cool things always sink (because they are more dense) and hot things always rise (because they are less dense) in convection. It does not matter if it is rock, air, water, metal, wax, oil, etc., convection always works the same.
What happens when magma rises through the earth's mantle?
Magma is molten rock and while it may rise to the crust and come out in volcanoes, it DOES NOT sink to the core. Do not think that the deep earth is made of molten rock, it is NOT, the Earth's mantle is solid. This said, even stuff which is solid flows like a liquid very slowly over Geologic time and the rocks of the mantle do indeed convect. as this happens the Earths continental, surface plates are moved around the planet.
When rock in the mantle cools does it sink or rise?
When rock in mantle cools, it sinks. When rock in mantle heats, it rises.
Does cool air sink while warm air rises?
yes the cool denser air sink while the warm less dense rises
Why does cool rock sink when convection takes place in the mantle?
Cool things always sink (because they are more dense) and hot things always rise (because they are less dense) in convection. It does not matter if it is rock, air, water, metal, wax, oil, etc., convection always works the same.
What happen to the crust when the molten rock sink to lower mantle?
aasdfghjkl
Can igneous rock sink?
Old, cool igneous rock sinks.
Why does cool air sink and warm air rises?
Because warm air is less dense then cool air.
Why does cool material sink when convection takes place in the mantle?
Cool things always sink (because they are more dense) and hot things always rise (because they are less dense) in convection. It does not matter if it is rock, air, water, metal, wax, oil, etc., convection always works the same.
Why does cool rock materials sink when convection takes place in the mantle?
Cool things always sink (because they are more dense) and hot things always rise (because they are less dense) in convection. It does not matter if it is rock, air, water, metal, wax, oil, etc., convection always works the same.
Why cool rock materials sinks when convection takes place in the mantle?
Cool things always sink (because they are more dense) and hot things always rise (because they are less dense) in convection. It does not matter if it is rock, air, water, metal, wax, oil, etc., convection always works the same.
When rock heats up and becomes molten rock does it sink closer to the core?
No, molten rock is less dense than solid rock and rises through the crust.
Where does Cooler older oceanic lithosphere sink?
Down into the mantle. At a depth of about 600 miles they become undetectable seismographicaly and are believed to have melted back into the mantle rock.
If the layers of rock sink to the Earth's mantle as a result of the sliding plates what will the fossils most likely experience?
they will be destroyed.
