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13 September, 16:27

Question 19 Unsaved

Which of the following is NOT one of the warning signs used to predict a volcanic eruption?

1)

changing chemistry of volcanic gas

2)

development and widening of surface cracks on the volcano

3)

earthquake activity

4)

the activity of animals

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Answers (2)
  1. 13 September, 17:15
    0
    I think its

    development and widening of surface cracks on the volcano
  2. 13 September, 19:21
    0
    The 2nd one have a great day ... : D
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