Презентация по английскому языку :"Типы катастроф" (7 класс)

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  disasters
  
  flood
  

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  Flood is a natural disaster.
  

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  There are several reasons for floods. One of them is excessive raining. At other times it is caused by the overflow of rivers or dam breaks.
  

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  It has negative outcomes, which lead to environmental and economic loses. As a result land gets washed away, houses are destroyed, people and animals die.
  

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  Floods are directly connected with climate and geography of the area. Some places are more exposed to heavy rains than others. For example, Bangladesh and the Philippines are under constant threat of floods.
  

• 8 слайд

  Flooding in Thailand December 28, 2014
  

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  Thailand has experienced its worst flooding in years over the last few months, leaving more than 420 people dead and causing severe damage across northern and central regions of the country. The last major flood occurred in 1995. During this year’s flooding it isn't raise the height of dykes for fear of damaging them. Instead sandbags were used, which ultimately gave way to the floodwaters.
  

• 10 слайд

  Some governments try to act in advance by establishing flood barriers and strengthening the river dams. For example Austria. Look!
  

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  AVALANCHES
  

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  What is the avalanche?
  Avalanche-a significant amount of snow mass falling or sliding off the steep slopes at a speed of about 20-30 m / s the avalanche. Is often accompanied by a side effect in the form of an air pre-avalanche wave, which produces the greatest destruction.
  

• 13 слайд

  What is dangerous avalanche?
  Snow avalanche, as a natural phenomenon, can pose a considerable danger, causing human casualties and causing significant damage to material property. Avalanches are dangerous for people because of their weight, which leads to death from shock as a result of broken bones, as well as weak or absent altogether breathability, which is why the victim dies from lack of oxygen (asphyxia).
  

• 14 слайд

  avalanches in Russia
  In Russia, the North Caucasus, the Urals, Sakhalin, Western and Eastern regions of Siberia and Altai are considered dangerous areas. Snow avalanches in the mountains descend annually, sometimes several times a year.
  
  

• 15 слайд

  Thunder and lighting
  

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  Thunder
  Thunder is a sound phenomenon in the atmosphere. Speed of sound is 300-360 meters per second.
  

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  Lighting
  Lighting is an electric spark discharge in the atmosphere. Also lightings were fixed in Venus, Uranus, Jupiter, Saturn. The longest lighting was in Oklahoma in 2007. The length was 321km. Most powerful thunder and lighting were in the Bear Ridge in Russia.
  

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  Thank you for your attention !