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16 April, 13:26

Which statements in this passage about volcanoes do not contain factual errors?

The Hawaiian islands are known for their volcanic activities. In fact, the islands were formed from volcanoes. 1. Before a volcano erupts, earthquake activity beneath the volcano decreases. 2. Scientists use seismometers to measure the earthquake activity that occurs beneath a volcano. They then predict the eruption of that volcano. 3. When a volcano erupts, the amount of carbon dioxide and sulfur dioxide emitted decreases. 4. Scientists measure the amount of these gases to determine the amount of magma present in the volcanic reservoir.

Answers (2)
  1. 16 April, 13:58
    I would say statement three because the other statement are completely true and have been been tested in controlled environments.
  2. 16 April, 14:34
    The answer is statement #3.
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