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[Old] Social science 2 Marks Each

Natural Disasters · Gujarat Board (GSEB) STD 8 (GSEB - English Medium). 3 questions.

Questions

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3 questions · timed · auto-graded

Question 12 Marks
What is a Tsunami ?
Answer
Tsunami is a Japanese word.
  • “Tsu” means a port and “nami” means waves.
  • Due to volcanic eruption or an earthquake on the sea/ ocean floor,huge, very strong and abnormally high and unimaginably long waves are created . These are called Tsunami”.
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Question 22 Marks
What are the reasons for the volcanic eruption ?
Answer
  • There are four reasons for volcanic eruption :
  • Very high temperature in the interior of the Earth.
  • Formation of liquid magma.
  • Formation of gases and water vapour and
  • Movement of magma towards the surface of the Earth.
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Question 32 Marks
What are the reasons for an earthquake ?
Answer
There are three reasons for earthquake . They are
  • Earthquakes caused by Volcanic eruptions (Volcanic Earthquakes)
  • Earthquakes caused by strike-slip faults (tectonic Earthquakes) and
  • Earthquakes caused by subduction in an active subduction zone (plutonic Earthquakes)
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2 Marks Each - [Old] Social science STD 8 Questions - Vidyadip