Earth's Mantle
The Earth’s mantle is located between the core and the crust. The mantle “...makes up the bulk of the Earth, accounting for two-thirds of the planets mass” (Alden, 2015b, para. 1). Scientists believe that the mantle is about 1,800 miles deep. Having the mantle make up a majority of Earth there are several layers to it; the lithosphere, asthenosphere, upper mantle and lower mantle. The elements that compose both the upper and lower mantle of the Earth are iron, oxygen, silicon, magnesium and aluminum (National Geographic Kids, 2015). Moving from the core outward the lower mantle is first. The lower mantle is hotter than the other layers of the mantle because it is closer to the core. The next layer is the upper mantle. The upper mantle is a strong solid layer between the lower mantle and the asthenosphere. The asthenosphere is the third portion of the mantle moving towards the crust.