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Stages of Activity Volcanoes have different stages of activity. An active volcano is one that is erupting or showing signs of erupting soon. A dormant volcano has not erupted for a while, but is expected to erupt in the future. An extinct volcano will probably never erupt again. Monitoring Volcanoes Geologists use a variety of technical instruments to study volcanoes and predict eruptions. Earthquakes, increases in ground temperature and escaped gases provide warning signals of potential eruption. clouds of ash & gases lava flows fires Destruction Caused by Volcanoes Volcanoes can cause widespread damage. Huge clouds of ash may bury towns, and volcanic gases can be deadly. A lava flow covers everything in its path and can start fires and landslides. Active Mount St. Helens, Washington Dormant Mauna Kea, Hawaii Extinct Mount Killimanjaro, Tanzania Warning Signs • surfacemovement • earthquakes • increased temperatures • escapedgases Life Cycle of a Volcano © Copyright NewPath Learning. All Rights Reserved. 94-4539 Visit www.newpathlearning.com for Online Learning Resources. Photos courtesy of USGS & NOAA.
Mount St. Helens, Washington Mauna Kea, Hawaii Mount Killimanjaro, Tanzania Pause and Review Name and define each volcano stage of activity. Stage: ___________________ ________________________ ________________________ ________________________ ________________________ ________________________ Stage: ___________________ ________________________ ________________________ ________________________ ________________________ ________________________ Stage: ___________________ ________________________ ________________________ ________________________ ________________________ ________________________ Life Cycle of a Volcano © Copyright NewPath Learning. All Rights Reserved. 94-4539 Visit www.newpathlearning.com for Online Learning Resources. What warning signs do geologist look for to predict if a volcano will erupt? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________
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