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Earth’s Outer Core The outer core is the liquid largely iron layer of the earth that lies below the mantle. Geologists have confirmed that the outer core is liquid due to seismic surveys of Earth’s interior.

Below the crust is the mantle, a dense, hot layer of semi-solid rock approximately 2,900 km thick. The mantle, which contains more iron, magnesium, and calcium than the crust, is hotter and denser because temperature and pressure inside the Earth increase with depth.

The mantle in liquid state due to its pressure and high temperatures. Explanation: Earth’s mantle is located under the earth the crust of the planet and is entirely made of the liquid magma and in the form of solid rock.

The Earth’s mantle is mostly solid from the liquid outer core to the crust, but it can creep on the long-term, which surely strengthens the misconception of a liquid mantle. Courtesy of the U.S. Geological Society.

It is mostly solid rock, but less viscous at tectonic plate boundaries and mantle plumes. Mantle rocks there are soft and able to move plastically (over the course of millions of years) at great depth and pressure. The transfer of heat and material in the mantle helps determine the landscape of Earth.

Some of the rock types that are common in the mantle include olivine, peridotite, pyroxene, and garnet. The mantle is denser than the crust but much less dense than Earth’s core, which is a huge ball of hot metal, mostly iron and nicke

The mantle is the mostly-solid bulk of Earth’s interior. The mantle lies between Earth’s dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth’s total volume

he four spheres of Earth are closely connected to each other. Birds(biosphere) fly through the air (atmosphere), water (hydrosphere) flows through the soil (lithosphere). The spheres of earth are closely connected to each other. A change in one sphere results in change in two or more spheres.

All of the oceans, lakes, seas and clouds are an example of the hydrosphere. All the waters of the Earth, as distinguished from the land and the gases of the atmosphere.

The geosphere is all of the rock, land and minerals on Earth, and you can remember this because ‘geo’ means ‘ground. ‘ The hydrosphere is all of the water on Earth, which makes sense since ‘hydro’ means ‘water. ‘ ‘Bio’ means ‘life,’ so all of the living organisms on Earth make up the biosphere.