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Earth Learning Idea (ELI) provides free Earth-related teaching ideas, designed to be practical science and geography resources for secondary and primary teachers and teacher-trainers and trainees across the world. It is run on a voluntary basis by three teachers from the Earth Science Education Unit (ESEU).
Earth science – all-embracing term for the sciences related to the planet Earth. [1] It is also known as geoscience, the geosciences or the Earthquake sciences, and is arguably a special case in planetary science , the Earth being the only known life -bearing planet.
Earth science or geoscience includes all fields of natural science related to the planet Earth. [1] This is a branch of science dealing with the physical, chemical, and biological complex constitutions and synergistic linkages of Earth's four spheres: the biosphere , hydrosphere / cryosphere , atmosphere , and geosphere (or lithosphere ).
Earth science or geoscience includes all fields of natural science related to the planet Earth. This is a branch of science dealing with the physical, chemical, and biological complex constitutions and synergistic linkages of Earth's four spheres: the biosphere , hydrosphere / cryosphere , atmosphere , and geosphere (or lithosphere ).
The most abundant silicate minerals on the Earth's surface include quartz, the feldspars, amphibole, mica, pyroxene, and olivine. [25] Common carbonate minerals include calcite (found in limestone), aragonite, and dolomite. [26] Elevation histogram of the surface of the Earth—approximately 71% of the Earth's surface is covered with water.
Earth's crust and mantle, Mohorovičić discontinuity between bottom of crust and solid uppermost mantle. Earth's mantle extends to a depth of 2,890 km (1,800 mi), making it the planet's thickest layer. [20] [This is 45% of the 6,371 km (3,959 mi) radius, and 83.7% of the volume - 0.6% of the volume is the crust].