Web1 / 20. What are some primary and secondary effects caused by Volcanic eruptions? Click the card to flip 👆. Definition. 1 / 20. Primary Effects - Buildings destroyed by fires, explosions, weight of ash, crops/livestock destroyed. Secondary Effects - Mudflows, changes in landscape/climate, food/water supply disrupted, homelessness, businesses ... WebRevise GCSE Geography and learn about the Earth's structure, tectonic plates, constructive and destructive plate margins, collision zones and more.
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WebAug 23, 2024 · Ridge push –magma rises as the plates move apart. The magma cools to form new plate material. As it cools It becomes denser and slides down away from the ridge. This causes other plates to move away from each other. Slab pull – The denser plate sinks back into the mantle under the influence of gravity. It pulls the rest of the plate along ... WebFeb 10, 2024 · At constructive plate margins tectonic plates move away from each other - usually at around 2cm a year. They are also known as divergent margins. At constructive margins tectonic plates move apart due to slab pull, ridge push or a combination of the two. Constructive margins often have very young rock because new crust is formed when … WebFeb 10, 2024 · The majority of tectonic hazards occur at plate margins - yet these plate margins are home to some of the most densely populated regions of the world, such as Japan and parts of China, meaning that … hugh rutherford savills