Density changes at Moho boundary. Moho boundary At the Moho boundary between the Earth's mantle and the crust the density of the rock changes from 2.9 grams per cubic centimeter to 3.4 grams per cubic centimeter. 0. The lower mantle is the lower liquid portion of the mantle ranging from 400 miles below the surface to about 1,800 miles below the surface. noun. The mantle is an important part of the body of a mollusk. 1. How to use mantle in a sentence. 0. It is 85% of the Earth's volume and encloses the liquid core. This cavity is formed by the mantle skirt, a double fold of mantle which encloses a water space. A loose sleeveless coat worn over outer garments; a cloak. The zone of the earth between the crust and the core. 2. The mantle encloses the mollusk's visceral mass, which is its internal organs, including the heart, stomach, intestines, and gonads. Temperature: 1200 K (∼ 932°C) at the upper boundary with the crust to 1900 K (∼1652 °C) at the boundary with the lower mantle . Learn more. Thickness: 255 miles (410 km) Density: ∼ 3400 kg/m 3 It is a rocky shell similar to Mercury, Venus and Mars. Major layers inside the Earth, USGS. Menu. What does mantle mean? Apart from the usual pragmatist antagonism to the apodictic laws of logic, this quotation embodies a typical historiographical myth. noun. Mantle cavity. 1. Upper Mantle. This space contains the mollusc's gills, anus, osphradium, nephridiopores, and gonopores.. An example of a mantle is a fancy shawl worn over a cocktail dress. The mantle cavity is a central feature of molluscan biology. Science terminology for kids Glossary of science terms for kids . mantle meaning: 1. the responsibilities of an important position or job, especially as given from the person who…. Meaning and definition of mantle: mantle- The layer of rock beneath Earth's crust . The mantle is muscular, and many species have modified it to use for siphoning water for feeding and propulsion. Rare exposures of mantle rocks occur in Most estimates of the mantle composition are based on rocks that sample only the uppermost mantle. For the term mantle may also exist other definitions and meanings, the meaning and definition indicated above are indicative not be used for medical and legal or special purposes. Mantle Science definition It is about 2,900 km (1,798 mi) thick and consists mainly of magnesium-iron silicate minerals, such as olivine and pyroxene. Another word for mantle. In bivalves it is usually part of the feeding structure. The mantle is divided into the upper and lower mantle. Find more ways to say mantle, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. It forms the outer wall of the mollusk's body. The temperature within the earth’s crust is high enough to melt rocks and form the lower layer called the upper mantle. The definition of a mantle is a shawl or a cloak. 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