Question

1) Make a Project File on Disaster Management including the following pages and topics. i) Cover Page ii) Acknowledgement iii) Introduction iv) Index Topics- Natural Disasters and their effects. a) Earthquake b) Hurricane c) Ozone layer Depletion Artificial Disaster and their effects. a) Gas leaks b) Riots c) Regional Disasters d) Money (Project must be hand written with good number of relevant photographs. v) Bibliography Compile your project in punching thin file not the stick file.

Answer 1

Answer:

1.Natural disasters are naturally occurring event which are caused either by rapid or slow onset of events.

2. It can be geophysical (earthquake,landslide and volcanic activity), hydrological (floods),climatological (drought,wildfires), biological (disease epidemic) or ​metrological (cyclones and storm)

Flood-It is caused when increased rainfall leads to overflow of water from rivers.Sometimes flooding also takes place due to the silting in river caused by the construction of dam.This raises river bed and therefore the chances of flood increase.

Earthquake-It is caused due to the abrupt shift of rock along a fracture line in the Earth.

Volcano- Volcano eruption is caused due to the pressure and density.When the part of lower crust or upper mantle melts,it forms magma.Its mass remain the same while its volume increases.It is less dense than the surrounding rock.This causes low density magma to rise and reach the earth surface.As magma rises it forms bubble and these gas bubbles exerts extreme pressure to bring magma on the surface.

Cyclone-1.Tropical cyclones are formed only over the warm ocean water around equator.Air from surrounding high pressure areas pushes into the low pressure areas.This surrounding cool air become warm and moist and rises and this cycle continues.

2.When the warm air rises it cool down.It forms cloud.The whole system of cloud and wind grows and fed by the evaporated water from the ocean.

3.As the storm rotates faster and faster, it forms eye in the centre which is calm, clear and of low pressure.

4.As the cyclone reaches the land surface, it get decapitate.