Natural Phenomena Lesson #1. Brain Storm: What is the definition of natural phenomena/disaster ...
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Transcript of Natural Phenomena Lesson #1. Brain Storm: What is the definition of natural phenomena/disaster ...
Grade 7-Geography
Natural PhenomenaLesson #1
Brain Storm:
What is the definition of natural phenomena/disaster List out as many natural phenomena/disasters as
you can Teacher to define natural phenomena and give
examples Videos about natural disasters Explain Hurricanes, Tornadoes, Earthquakes,
Volcanoes and Tsunamis Trends of natural disaster graph
Agenda
disaster caused by natural forces rather than by human
action that affects the environment, and leads to
financial, environmental and/or human losses
What is a Natural Phenomenon
Avalanches Blizzards Cyclones
Earthquakes Floods and
landslides
Heat waves Storms
Tornadoes Tsunamis Volcanoes Wildfires
List of Natural Phenomenon
Hurricanes : explains why they start and they
work http://www.youtube.com/watch?v=4f45jA5UxB0
Tornadoes: explain how tornadoes form http://www.youtube.com/watch?v=2GWtfb5l8iA
Earth quakes: http://www.youtube.com/watch?v=CtBXTvtFaCU&feature=fvw
Sinkholes http://www.youtube.com/watch?v=nGkDouBVoLs
Video Clips
Hurricanes is a strong wind
with a consistent speed of 74 miles (119 kilometers) an hours –speed of a car driving on a highway
Hurricane season peaks from mid-August to late October and averages five to six hurricanes per year.
Hurricane sometimes can turn into a Tornado
What is a Hurricane?
Tornadoes: Tornadoes are vertical
funnels of rapidly spinning air. Wind my go above 250 miles (400 kilometers)
United States is a major hotspot with about a thousand tornadoes every year.
Tornadoes are classified as weak, strong, or violent storms. Violent tornadoes comprise only about two percent of all tornadoes, but they cause 70 percent of all tornado deaths and may last an hour or more
What is a Tornado?
Earthquakes
occur when two plates move suddenly against each other.
Volcanoes are also caused by the shift of the tectonic plates as it creates a break in the ground
What is an Earthquake
The name "volcano" has its origin
from the name of Vulcan, a god of fire in Roman mythology.
As pressure in the molten rock builds up it needs to escape somewhere. So it forces its way up “fissures” which are narrow cracks in the earths crust. Once the magma erupts through the earth’s surface it’s called lava.
There are around 1510 'active' volcanoes in the world. We currently know of 80 or more which are under the oceans.
What is a Volcano
The most common causes of
tsunamis are underwater earthquakes
A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet (30.5 meters), onto land. Tsunamis race across the sea at up to 500 miles (805 kilometers) an hour—about as fast as a jet airplane.
What is a Tsunami
a sinkhole happens when water
erodes solid bedrock, carving an underground cavity that can then collapse.
Heavy rains from tropical storm Agatha likely triggered the collapse of a huge sinkhole in Guatemala (South America next to Mexico) on June 2010.
The sinkhole is 60 feet (18 meters) wide and about 300 feet (100 meters) deep
What is a Sinkhole?
Natural Disasters Reported between 1900-2009
Grade 7-Geography
Natural PhenomenaLesson #2
Review what is a natural disasters Finish anything left over from lesson #1 Have students work in groups reading articles
and discuss about the effect/damages of the natural disasters. –Each group will share their article with the class and talk about the damages it caused
Teacher to go over the damages caused by the natural disaster and give some statistics if there is time
Agenda
A tornadoes' funnel is like a giant vacuum cleaner. It
sucks up anything on the ground it touches. Tornadoes can lift vehicles, cut power lines and tear
off roofs. They can ruin crops and other vegetation They can destroy chimneys, roof shingles, satellite
dishes and tree branches. The worst tornadoes can flatten trees and crush
metal buildings Flying debris can cause damage Can hurt or even kill people
Effects of Tornadoes
The pounding water can strip away sand from
beaches and tear up trees and other vegetation (plants).
Tsunami can destroy costal towns and villages. People can be swept away and drowned.
Effects of Tsunami
Cause damage to
property such as homes, cars business and farms
Cost a lot of money-as homes and structures need to be rebuild
Causes injuries and death to humans and animals
Cause trauma and psychological effect
Effects of Natural Disasters