نتكلم في هذه المحاضرة عن التركيب الداخلي للأرض وطبقاته الثلاث: القشرة - الوشاح - اللُب، ونتكلم عن صورة التشققات الطينية وكيف تتكون، وأيضاً تحدثنا عن مصطلحات هامة في علوم الأرض والجيولوجيا
6. Earthquakes: ground shaking caused by the energy that is released when rock
on either side of a fault suddenly moves.
Effusive eruption: a volcanic eruption where hot, runny lava is produced, rather
than violent explosions of ash and gas.
Estuary: Tidal part of a river towards its mouth (e.g., Thames estuary, UK).
Erosion: breakdown and removal of rock material by flowing water, wind, or
moving ice. Not to be confused with weathering!
Eruption (volcanic): escape of molten rock (magma) at the Earth's surface. A
series of eruptions (over many years) gradually builds up a volcano.
Evaporation: drying out of sea water (usually) in warm, dry climates, leaving
behind deposits of crystalized mineral salts.
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7. Lagoon: an area of shallow water enclosed by sand banks or reefs. Tropical lagoons
may also have small "patch reefs" growing within them.
Landslide: general term for mass-movement of rock material down a slope (includes
rock falls, landslips, mudflows etc.).
Landslip: mass-movement where rock material (often clay) slips down slope along a
defined slip surface (often gently curved).
Lava: molten rock (e.g. Basalt) erupted from a volcano.
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