caption: Earth s Layers Mantle Largest layer of the Earth
exif: {"Image DocumentName": "Earth s Layers Mantle Largest layer of the Earth", "Image ImageDescription": "Under the crust about 2,890km. Composed of silicate rocks rich in magnesium and iron. Intense heat causes the rocks to rise and then cool and sink. The process is called convection, which causes the crust to move. Average temperature 3000o. \u00a9 KeslerScience.com.", "Image XResolution": "200", "Image YResolution": "200", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}