BhagBSDK Our Earth was formed 4.5 billion years ago. Earth is like a closed system, with its internal temperature and pressure. The structure of Earth is like a Geoid Information related to the interior part depends on 2 points. Artificial -- Density -- Pressure -- Temperature Natural -- Volcano -- Meteors -- Earthquake 1. Density Particle in a particular volume Unit: Gram/Cm2 Solid > Liquid > Gas Earth Surface density: 2.9g/cm3 Depth increase = density also increase Middle part density - 5.5 g/cm3 Inner part density - 13g/cm3 At the centre of the Earth heaviest metal is found. Average density of Earth: 5.5 g/cm3 Highest on all planets 2. Temperature Temperature increases if depth increases. 32 mt depth = +1°C Temperature increases, but not uniformly. Radioactive substances > Increase Temp. > Rock melted and metals formed magma. -- The Earth's internal temperature is primarily influenced by radioactive substances. -- Temperature of Magma: 700 to 1300°C -- Maximum temperature at Earth's core: 6000°C 3. Pressure The interior part of Earth is closed. Pressure ∝ Temperature. Maximum pressure found at the Centre of the Earth. 1. Volcanism Magma comes out from the interior, and that substance is called lava. When it cools and solidifies, it forms igneous rocks, which provide information about the interior of the Earth. 2. Meteors They are remnants of the early solar system, sharing a similar composition to the materials from which Earth and its core formed, which provides insights into Earth's structure and interior because 3. Earthquake Earthquakes generate seismic waves (P-waves and S-waves) that travel through the Earth's interior, and by analysing their travel times, speeds, and how they refract or reflect, scientists can deduce the density, composition, and state (solid/liquid) of different layers. International Union of Geodesy and Geophysics. Crust Upper Layer (30 Km) Silicam Aluminium 1% Mental Middle Layer (30-2900) Km Silica, magnesium 83% Core Inner Layer (2900-6371) Km Nickil, Ferrous 16% According to Daley Lithosphere (0-100) Km Solid part having Minerals and groundwaters. Further divided into two parts. -- Continental Part --- Granite Rock found -- Oceanic Part --- Basalt Rock found Asthenosphere (100-400) Km Radioactive substances are found./Magma found/ -- Also known as Magma Chamber. Mesosphere Hard rock found Barysphere Outer Part: Magma found -- Magma create friction, which creates a magnetic field. Inner Part: Solid
BhagBSDK Discontinuity An imaginary line represents variation. Conrad Upper Crust - Lower Crust Moho Lower Crust - Upper Mantle Repeti Upper mantle - Lower mantle Gutenberg Lower Mantle - Upper Core Lehmann Upper Core - Lower Core Half of the crust formed from Fedalsper minerals.
