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noun. ˈkrəst. Synonyms of crust. 1. a. : the hardened exterior or surface part of bread. b. : a piece of this or of bread grown dry or hard. 2. a. : the pastry shell of a pie : piecrust. b. : the bready layer that forms the foundation of a pizza. 3. : a hard or brittle external coat or covering: such as. a.
Apr 25, 2024 · Article. Vocabulary. “ Crust ” describes the outermost shell of a terrestrial planet. Our planet ’s thin, 40-kilometer (25-mile) deep crust—just 1 percent of Earth ’s mass—contains all known life in the universe. Earth has three layers: the crust, the mantle, and the core.
CRUST definition: 1. a hard outer covering of something: 2. the outside layer of a loaf of bread: 3. a hard outer…. Learn more.
In geology, the crust is the outermost solid shell of a planet, dwarf planet, or natural satellite. It is usually distinguished from the underlying mantle by its chemical makeup; however, in the case of icy satellites, it may be distinguished based on its phase (solid crust vs. liquid mantle).
Crust definition: the brown, hard outer portion or surface of a loaf or slice of bread (distinguished from crumb).. See examples of CRUST used in a sentence.
Earth - Core, Crust, Mantle: Earth’s outermost, rigid, rocky layer is called the crust. It is composed of low-density, easily melted rocks; the continental crust is predominantly granitic rock (see granite), while composition of the oceanic crust corresponds mainly to that of basalt and gabbro.
Earth's crust is its thick outer shell of rock, referring to less than one percent of the planet's radius and volume. It is the top component of the lithosphere , a division of Earth's layers that includes the crust and the upper part of the mantle . [1]
