The earth surface is constantly changing through slow processes that we dont usually see.One is erosion. This has worn away rocks and mountains over millions of years,Caused by air water, and wind.Another change is caused by earthquakes that originate deep inside the planet.More sudden and violent erosion,An earthquaked result when strains between Earth's plates produce shock waves.And,the third process result when molten rock forming material called lava,escapes onto the surface through gaps in the cust.What we experience is volcanic eruption

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