Noun. 1. heat sink-a metal conductor specially designed to conduct (and radiate) heat. conductor-a device designed to transmit electricity, heat, etc. sink - (technology) a process that acts to absorb or remove energy or a substance from a system; the ocean is a sink for carbon dioxide.
The crust is composed of many different types of rocks that fall within three main categories: igneous, metamorphic and sedimentary. However, most of those rocks originated as either granite or basalt. The mantle beneath is made of peridotite. Bridgmanite, the most common mineral on Earth, is found in the deep mantle. How We Know the Earth Has a Crust
According to Science Daily, the types of rock that make up the continental crust include metamorphic, sedimentary and granitic. These rocks form continents and shallow sea beds, which are called... According to Science Daily, the types of rock that make up the continental crust include metamorphic, sedimentary and granitic. These rocks form continents and shallow sea beds, which are called continental shelves. The continental crust floats above the Earthâs mantle, as it is made up of a less dense material. The continental crust is also less dense than the oceanic crust, which is primarily made of basalt. However, the continental crust is up to 40 kilometers thicker than the oceanic crust, which is 7 to 10 kilometers thick. Around 40 percent of Earthâs surface is underlain by the continental crust. Learn more about Layers of the Earth