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PIMSO 2023 - Science - Secondary 1 - National Round Question 23

PIMSO Science · PIMSO 2023 - Science - Secondary 1 - National Round

Question 23

Volcanic eruptions are difficult to predict, but there are signs which tell if an imminent eruption may occur. The following statements describe the signs of an imminent volcanic eruption, except which one?
  1. Increase in frequency and intensity of earthquake
  2. Increase in landslide occurrence
  3. Increase in swelling of ground surface
  4. Changes in composition and abundance of gas emissions
  5. All of the above are signs of imminent eruption.