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Unit 19: Natural Disasters pt 1

Unit 19: Natural Disasters pt 1. NATURAL DISASTERS. An event that occurs naturally and affects the earth’s surface and environment Man made disasters occur as a result of human error and or accidents. NATURAL DISASTERS. Can be land, water or weather disasters

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Unit 19: Natural Disasters pt 1

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  1. Unit 19: Natural Disasters pt 1

  2. NATURAL DISASTERS • An event that occurs naturally and affects the earth’s surface and environment • Man made disasters occur as a result of human error and or accidents

  3. NATURAL DISASTERS • Can be land, water or weather disasters • Land disasters occur due to movement of the earth’s land surface • Volcanic eruptions, earthquakes, landslides and avalanches • Water disasters involve huge amounts of water moving at a greater speed • Floods, storms and tsunamis • Weather disasters occur due to extreme changes in weather elements • Tornadoes, droughts, blizzards, heat waves

  4. Unit 19: Typhoons TYPHOONS

  5. Unit 19: Typhoons WHAT IS A TYPHOON? • Large tropical storms that produce strong winds and large volumes of rains • Occurs during certain periods of the year • Eye of the typhoon is a low pressure region where the winds spin • Strong winds and rains surround the eye of the storm

  6. Unit 19: Typhoons EFFECTS OF TYPHOONS • ON THE ENVIRONMENT • May cause landslides, uproot trees, • May produce a storm surge (rise in the water level as the typhoon makes a land fall) which may result to flooding • ON PROPERTIES • Water and wind damage of properties such as cars, houses, and even death may result

  7. Unit 19: Typhoons SIGNS OF AN APPROACHING TYPHOON • Satellite pictures • Show speed of wind, clouds and storms • Can estimate the course and strength of a typhoon • Aircrafts pick up info by flying close to it • Ships monitor oceanic temp • Weather radars on land

  8. Unit 19: Typhoons MEASURES TO BE OBSERVED • Before a typhoon • Turn off and unplug appliances • Secure glass windows • Secure objects which may be carried by the wind • If and when needed, go to an evacuation center • Bring an emergency kit • If not, stay indoors and away from windows • Hide in basements and underground bunkers • Have an adequate supply of clothes, food, batteries, drinking water; have portable radio

  9. Unit 19: Typhoons MEASURES TO BE OBSERVED • During a typhoon • Continue to stay indoors • Monitor radio for updates

  10. Unit 19: Typhoons MEASURES TO BE OBSERVED • After a typhoon • Be careful in going around the premises • Be on the lookout for broken materials, including electrical lines • Ensure structural integrity of your house • Stay away from flood waters, if possible

  11. Unit 19: Volcanic Eruptions VOLCANIC ERUPTIONS

  12. Unit 19: Volcanic Eruptions VOLCANOES • An opening in the ground though which lava, hot gases, ash and rocks are released at a great force. • They are formed when tectonic plates move towards or away from each other • The PLATE TECTONIC theory explains why plates move

  13. Unit 19: Volcanic Eruptions HOW A VOLCANO ERUPTS

  14. Unit 19: Volcanic Eruptions THE PACIFIC RING OF FIRE Belt around the Pacific Ocean Active volcanoes are located due to the active movement of the plates

  15. Unit 19: Volcanic Eruptions TYPES OF VOLCANOES Cococachi in Equador Taal Volcano Three Sisters in Colorado

  16. Unit 19: Volcanic Eruptions DANGERS OF AN ERUPTION • Explosive (pyroclastic) eruptions may • Eject ash, gas and very big rocks • Makes breathing difficult • Smell of sulphur is foul • Hot lava may destroy outlying properties • Non explosive eruptions may also destroy properties

  17. Unit 19: Volcanic Eruptions SIGNS OF A VOLCANIC ERUPTION • A volcanic eruption may be predicted • As magma starts to move • Seismographs and seismometers detect and record this • Gas and steam emissions • Tremors and bulges

  18. Unit 19: Volcanic Eruptions MEASURES TO BE OBSERVED • Before a volcanic eruption • For those living near volcanoes • Keep eye and mouth protection • Put together an emergency kit • Stay away from permanent danger zones • Do not resist evacuation • Know evacuation route

  19. Unit 19: Volcanic Eruptions MEASURES TO BE OBSERVED • During a volcanic eruption • Stay clear of lava and other pyroclastic materials • Avoid rivers and other low lying areas • Route taken by hot lava and lahar (water and mud) • Protect arms and legs, as well as eyes and mouth • Close windows and doors to prevent ash from getting in the house

  20. Unit 19: Volcanic Eruptions MEASURES TO BE OBSERVED • After a volcanic eruption • Remove ash from roofs (have adults do this) • Continue wearing protective gears • Stay away from rivers which may be routes of lahar

  21. sources • gadgets.boingboing.net • wunderground.com • worldatlas.com • pacificislandparks.com • volcanochild.co.uk • Istockphoto.com • ecuador-travel.net • ellerbruch.nmu.edu • eos.higp.hawaii.edu • armageddononline.org • oml13.glogster.com

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