Transcript מצגת של PowerPoint

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In this lesson you will
find out about natural disasters.
read maps.
learn how to protect yourselves
against the elements of nature.
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Natural disasters come in
many shapes and sizes.
Hurricanes, for example, are
severe tropical storms.
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Hurricanes form in the southern
Atlantic Ocean, Caribbean Sea,
Gulf of Mexico, and in the eastern
Pacific Ocean. They gather heat
and energy through contact with
warm ocean waters.
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Hurricanes rotate in a counterclockwise direction around an
"eye“. Hurricanes have winds of at
least 74 miles per hour.
When they come onto land, the
heavy rain, strong winds and heavy
waves can damage buildings, trees
and cars and, of course, take
human lives.
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We can use meteorological
instruments to predict an
oncoming hurricane.
An earthquake, however, is
another story.
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Most times, you will notice
an earthquake by the gentle
shaking of the ground. You may
notice hanging lamps swaying or
objects wobbling on shelves.
Sometimes, you may hear a low
rumbling noise or feel a sharp jolt.
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sway
shaking
wobbling
sound of noise
rumbling
movement
Earthquakes are the shaking,
rolling or sudden shocking of
the earth’s surface.
Earthquakes occur along
"fault lines" in the earth’s
crust.
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Earthquakes can be felt over
large areas, although they
usually last less than one
minute. Earthquakes cannot
be predicted -- although
scientists are working on it!
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The intensity of an
earthquake can be measured
on an instrument called the
Richter scale. Earthquakes
below 4.0 on the Richter scale
do not usually cause damage.
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Earthquakes over 5.0 on
the scale can cause
damage. A magnitude 6.0
earthquake is considered
strong and a magnitude 7.0
is a major earthquake.
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“A new earthquake measuring
7.2 on the Richter scale
ripped through northwestern
India flattening hundreds…”
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7.2 on the Richter scale tells
you the earthquake caused :
1.
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severe damage
2.
no damage
3.
minor damage
4.
considerable damage
Here is a picture of
a rescue worker in
Ahmedabad, in
Western India,
risking his life to
detach a potentially
deadly gas cylinder.
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The rescue worker can get hurt
1. by the falling pieces of building
(debris).
2. from disconnecting the gas balloon
3. both 1 and 2.
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Praying in the Rubble
An Indian man prays in front of his house in
the western Indian city of Bhuj, after a
massive earthquake
destroyed it. The death
toll from the powerful
quake, which devastated
western India, reached
over 50,000.
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Ruined Home
These residents of Hyderabad, Pakistan,
about 100 miles from the port city of
Karachi, sit outside their collapsed home.
Although the epicenter
was in neighboring
India, today's
earthquake killed at
least four in the
southern Pakistani
province of Sindh.
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In your opinion, if your house
were destroyed,what would you
miss the most?
I think I would miss __________
___________________the most.
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In addition to earthquakes
and hurricanes, man has to
deal with many other kinds of
natural phenomena, such as
thunderstorms, lightning,
floods, and drought.
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Thunderstorms effect small
areas when compared with
hurricanes. The typical
thunderstorm is 15 miles in
diameter and lasts an average
of 30 minutes.
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Nearly 1,800 thunderstorms
are happening at any moment
around the world.
That's 16 million a year!
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Diameter of
thunderstorm
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Length of average
thunderstorm
1,800
16,000,000
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Number of thunderstorms
occurring right now
Number of thunderstorms
per year
Despite their small size, all
thunderstorms are dangerous. Every
thunderstorm produces lightning, which
kills more people than tornadoes do,
each year.
Tornadoes are __________dangerous
___________________ lightning.
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The lightning is seen
before the thunder is
heard, because light
travels faster than sound.
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The average flash of
lightning could turn on a
100 -watt light bulb for
more than 3 months.
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The air near a lightning
strike is hotter than
the surface of the sun!
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Your chances of being
struck by lightning
are estimated to be
1 in 600,000 .
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You can reduce your
chances of being struck
by lightning by following
safety rules.
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Try to see how well you
remember the words we
mentioned in today’s
lesson.
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Unscramble each of the clue
words. Copy the letters in the
numbered cells to other cells
with the same number.
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Homework
Think of five things that you could do
to help the victims of a flood. Take
into consideration what the families
have lost and what they would need
the most. Remember, sometimes it’s
the little things that count the most.
http://www.fema.gov/kids/p_fld.htm
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