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Essays for secondary school1  

Almost every day we hear that some nature disaster has happened somewhere in the world. Human can not stop these disasters, but they can learn about them and try to do something to ...

Presentations for secondary school13  

Earthquakes An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves. At the Earth's surface, earthquakes manifest themselves by ...

Presentations for secondary school11  

Flood: It is natural component of river’s year cycle Continuous, slashing rain Fast escape-pipes’ overflow Deforestation Draining Riverbed’s erection What can we do? To ...

Essays for secondary school1  

Haiti's worst earthquake in two centuries hit south of the capital Port-au-Prince in 12 January 2010. Hundreds of buildings were damaged or destroyed, millions were relocated, ...

Presentations for secondary school10  

Earthquakes & volcanic activity Earthquakes often occur in volcanic regions and are cause there, both by tectonic faults and the movement of magma in volcanoes. Size and ...