Transcript File

Natural Disasters
How
do Earth's
systems interact
during a storm?
 Describe
ways humans protect
themselves from hazardous weather and
sun exposure.
 Investigate how natural disasters affect
human life in Florida.
Essential
 How
Question
have natural disasters affected lives in
Florida?
 How do humans protect themselves from
hazardous weather and sun exposure?
 https://www.brainpop.com/science/eart
hsystem/naturaldisasters/
 1.
What do tornadoes and hurricanes have in
common?
 a. They both form over the ocean
 b. They both involve strong winds
 c. They are both types of tropical storms
 d. They both include funnelshapedclouds
 Weather
that can cause serious property
damage and sometimes death
 Three main forms that affect Florida –
• Thunderstorms
• Tornadoes
• Hurricanes
• Also sinkholes
 Small, intense
weather system that
produces strong winds, heavy rain,
lightning, and thunder
 Two atmospheric conditions must be
present: 1) warm moist air rising
 2) unstable atmosphere which is when
the air is colder than the rising air mass
(COLD FRONT)
 https://www.youtube.com/watch?v=F2g0
3smmcUY
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Build an emergency kit and make a family communications plan.
Remove dead or rotting trees and branches that could fall and
cause injury or damage during a severe thunderstorm.
Postpone outdoor activities.
Remember the 30/30 Lightning Safety RuleSecure outdoor objects
that could blow away or cause damage.
Get inside a home, building, or hard top automobile (not a
convertible). Remember, rubber-soled shoes and rubber tires
provide NO protection from lightning. However, the steel frame of
a hard-topped vehicle provides increased protection if you are not
touching metal.
Shutter windows and secure outside doors. If shutters are not
available, close window blinds, shades or curtains.
Unplug any electronic equipment well before the storm arrives.
What's
the biggest danger posed by
thunderstorms?
a. Being blown around by high winds
b. Being soaked by heavy rain
c. Being deafened by loud thunder
d. Being struck by lightning
 Lightning
is created by an electrical
discharge between a positive and
negative area
• Lower in clouds = negative
• Higher in clouds = positive
• Land = positive
 Thunder
is a result of rapidly expanding
air
• Lightning strikes, heats up air, expands quickly,
vibrates and releases sound wave
• https://www.youtube.com/watch?v=h-
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Lightning is an electric current.
Within a thundercloud, many small bits of ice bump into
each other. All of those collisions create an electric
charge.
The cloud fills up with electrical charges. There are
positive charges at the top and negative charges at the
bottom of the cloud.
Opposites attract so a positive charge builds up on the
ground beneath the cloud.
The ground’s electrical charge concentrates around
anything that sticks up, such as mountains, people, or
single trees.
The charge coming up from these points eventually
connects with a charge reaching down from the clouds.
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The “30/30 Rule” is a common term to remember for a
thunderstorm. Once you see lightning strike, count to
30. If you hear thunder before you reach the number 30,
get indoors. Once the storm has passed, don’t go
outside until it’s been 30 minutes since the last time you
heard thunder.
Listen to Weather Reports
Most people who are hit by lightning get caught
outdoors during the summertime. Some of the most
common incidents happen when people are hiking or
on the golf course.
 Destructive, rotating
column of air that
has very high speed winds and is
sometimes a visible funnel-shaped cloud
• Only becomes visible as the tornado picks up
dust from the ground or from the air
 Forms
when a thunderstorm meets with
horizontal winds; winds cause the
thunderstorm to spin
 Rotating,
funnel-shaped clouds from powerful
thunderstorms
 Winds up to 300 MPH capable of producing
major damage
 More occur in the United States than
anywhere else in the world; they occur in
every state in America.
 https://www.youtube.com/watch?v=lmWh9jV
_1ac
 Pick
a place where family members
could gather if a tornado is headed your
way. A center hallway, bathroom, or
closet on the lowest floor. Keep this place
uncluttered.
 If you are in a high-rise building, you may
not have enough time to go to the lowest
floor. Pick a place in a hallway in the
center of the building.
Massive
severe storms occurring in the
tropics
Winds greater than 75 MPH
Clouds & winds spin around the eye
Produce heavy rains, high winds, large
waves, and spin-off tornadoes
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https://www.youtube.com/watch?v=Wk_FVXVnE2I
 Tropical
low-pressure system with winds
blowing at speeds of 119 km/h (74 mi/h) or
more
 Ranked into Category based upon wind speed
– 1 = weakest, 5 strongest
 As long as it stays above warm water, it can
grow bigger and more powerful
 Called typhoons when they form over the
Western Pacific; called cyclones when they
form over the Indian Ocean
 Hurricane
winds can lift cars, uproot
trees, and tear roofs off buildings
 When a hurricane moves into a coastal
area, it pushes a huge amount of ocean
water known as a storm surge; causes
large waves, sea level rises, backs up
rivers, and floods the shores
 Tropical
Storms (which may form into
hurricanes) are assigned names to better
identify them while tracking them
• Uses the letters in order of the alphabet (new set
each year); Alternates Boy/Girl
• Example: Andrea, Barry, Chantal, Dorian
 Katrina
(2005) = Category 4-3 at landfall
 Andrew (1992) = Category 5
 Only 32 Category 5 Atlantic hurricanes
have EVER formed; only 3 have made
landfall at a Cat 5 in FL
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Stay informed by tuning in to weather updates. Hurricanes are
unpredictable.
• Have a vehicle ready. Check gas, oil, water and maintenance.
• Check emergency evacuation supplies.
• Fill clean containers and bathtubs with water for drinking,
cooking, washing and to flush toilets.
• Turn the refrigerator and freezer controls to the coldest
settings.
• Board or put storm shutters on windows to reduce the risk
and danger of broken windows and flying glass.
• Clear yard of loose objects, bicycles, lawn furniture, trash
cans, etc.
• Secure boats.
esult from heavy rains
 May involve rivers overflowing, storm
surge/ocean waves, & dams or levees
breaking
 Most common natural hazard
 Flashfloods = floods that happen very
fast
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Determine whether you live in a potential flood zone.
Keep abreast of road conditions through the news
media. Move to a safe area before access is cut off by
flood water.
Develop a flood emergency action plan.
Have FLOOD INSURANCE. Flood damage is not
usually covered by homeowners insurance. Do not
make assumptions. Check your policy.
Purchase and use a NOAA Weather Radio.
Suwannee River
Cedar Key
 Occur
in forests, grasslands, and wooded areas
 Most common causes: lightning and human
accidents
 Burn more than 4 million acres in the U.S. each
year
 Choose
home locations wisely.
 Use fire-resistant materials when building or
renovating.
 Avoid designs that include wooden decks and
patios.
 Use non-combustible materials for the roof.
 Clear gutters of leaves and debris.
blaze near the
Georgia border
South Florida