Available Answers

1. 1.

   Choose the correct answer.

   1. In terms of natural disasters, active, dormant and extinct are the types of 
      1. avalanches
      2. landslides
      3. earthquakes
      4. volcanoes
   2. Earthquakes are caused due to
      1. heavy rain
      2. excessive heat
      3. movement in earth's crust
      4. high pressure
   3. The epicentre of the earthquake is a point
      1. under the earth
      2. on the earth's surface above the focus
      3. upto which tremors are felt
      4. none of these
   4. An opening in the earth's crust that allows magma to reach the earth's surface is called a 
      1. spring
      2. fountain
      3. volcano
      4. geyser
   5. The instrument used to record seismic waves, is
      1. seismograph
      2. seismometer
      3. wind vane
      4. barometer
   6. A phenomenon that is not a cause of tsunami, is
      1. undersea landslide
      2. undersea earthquake
      3. cloud burst
      4. nuclear strike
   7. The country hit by a massive earthquake followed by tsunami and volcanic eruption in march 2011, is 
      1. China
      2. Japan
      3. Bangladesh
      4. USA
2. 2.

   What is the cause of natural disasters?
3. 3.

   Name the passage through which lava travels.
4. 4.

   Name the underground origin of the vibration in an earthquake.
5. 5.

   How does a tsunami occur?
6. 6.

   How is the intensity of an earthquake decided on a Richter Scale?