Presentation on Interior of the earth (SEJUTI).pptx

Course work on Interior Structure of Earth

1. Presentation On INTERIOR OF THE EARTH Date-11 March, 2018. By— Saida Islam Sejuti Roll: 18103432 1 st Year, 1 st Semester Department of Environmental Science and Engineering.

2. Inner Core Outer Core Lower/Stiffer Mantle Upper/Rigid Mantle Crust (oceanic and continental) Asthenosphere Atmosphere Hydrosphere Lithosphere

3. Crust: Continental—Silica & Aluminum (SIAL)- 35 kms Oceanic—Silica & Magnesium (SIMA)- 5 kms Boundary between upper & lower crust– Conrad discontinuity Boundary between crust & mantle- Moho discontinuity Jigsaw pazzle Thinnest layer

4. Mantle: About 2900 kms thick 85% by volume 64% by mass Made of iron & silicates Asthenosphere- upper mantle, convecsion currents Viscus , weak & doctile Just below Lithosphere Main source of magma Boundary between upper & lower mantle– repetty discontinuity Boundary between mantle & core– Guttenburg discontinuity 85% 64% 2900km Fe, Silicates Liquid Solid

5. Core: Radius is about 3500 kms . Made of Nickel & Iron. High temperature & pressure. 15% of earth’s volume. 32.5% of earth’s mass. Boundary between Outer & Inner core– Lehmann discontinuity. Outer core– Liquid (slow moving– produces earth’s magnetic field) Inner core– Solid Pressure, density Increases towards center. Fe Ni, Fe

6. Most sensitive Hot spot of volcanic activity Causes continental drift Creates plate tectonics Do you remember ...??? MANTLE

7. ##“ Far be it from me to suggest that geologists should be reckless in their drafts upon the bank of Time; but nothing whatever is gained, and very much is lost, by persistent niggardliness in this direction. ” ## -- by Charles Lapworth

8. “ARE WE READY For THIS GREATER responsibility …??? ” ** Thank You **