With reference to the mantle of Earth, semi-molten means it is in a state that is like very hard rubber. It CAN be shaped, but only by very powerful forces (such as those involved in plate tectonics). Think of it almost like very tough silly putty. It's not quite a solid, but it's not liquid, either.
The asthenosphere is composed of partially molten rock and solid rock with high levels of plasticity, found in the upper mantle beneath the lithosphere. It is responsible for the movement of tectonic plates due to its semi-fluid state and allows for the flow of magma towards the Earth's surface.
The layer you are referring to is the asthenosphere, which is a semi-molten layer of the upper mantle beneath the lithosphere. It plays a critical role in plate tectonics by allowing the lithospheric plates to move around on the more fluid asthenosphere.
The asthenosphere is composed of partially molten rock material, mainly consisting of peridotite and basalt. It is located beneath the lithosphere and is responsible for the movement of tectonic plates due to its semi-fluid nature.
The layer of the Earth that is hot and semi-solid is the mantle. The mantle is located between the Earth's crust and core and is made up of molten rock, called magma, that circulates due to heat convection from the Earth's core.
The asthenosphere, located in the upper mantle, is easily deformed due to its semi-molten state. This layer allows tectonic plates to move on the ductile rock beneath them.
The asthenosphere is in a semi-molten state because of high temperatures and pressure. The combination of these factors causes the rocks in the asthenosphere to deform and flow slowly, giving it its semi-molten properties. This allows the tectonic plates to move and interact with each other.
A semi-molten state refers to a material that is partially melted or in a partially liquid state. It often occurs at high temperatures where some of the material has melted while some parts remain solid. This state can lead to unique properties and behaviors in materials.
Magma!
no
Understanding that the core of the Earth is still hot and semi-molten.
Magma is the semi-molten rock layer on which the crust floats.
The upper mantle is primarily composed of solid rock, but it can exhibit semi-molten properties in certain areas due to high temperatures and pressures. This semi-molten state allows for the movement of tectonic plates, as it can flow slowly over geological time. Overall, while it is mostly solid, the upper mantle contains regions that behave like a viscous fluid, facilitating geological processes.
Liquid form: Molten Lava
Tectonic Plates are sections of the Earth's crust that are actually floating on the surface of the semi-molten Magma.
The crust, on which we live on, is like islands of tectonic plates that are floating on the semi-molten magma.
we can call it an igneous rock because it coming from partial melting of preexisting rocks
The crust and part of the mantle is made of rocks and solids. The other layers under the earth are mostly composed of molten lava or semi-molten rocks.