Thursday, May 11, 2006

National Geographic's Forces of Nature

Explore hurricanes, earthquakes, tornadoes, and volcanoes at National Geographic's Forces of Nature website. Your job is to:

1. Pick a natural catastrophe to learn about.
2. Explore this catastrophe by exploring the catastrophe at your own pace. Do NOT just skip to the simulation at the end!! (If I see this happening, you will lose computer priviledges.)
3. Once you have read & explored the information of the catastrophe of your choice, write a well developed paragraph about your catastrophe. Then write a second paragraph about the new facts that you learned. This should be done on loose leaf paper.
4. Proofread your paragraph for spelling & grammar errors. (Reading/Language students should pay close attention to this.)
4. Post your paragraphs to this blog.

All homeroom and reading students are responsible for this assignment.
Due date: May 23.

32 Comments:

At Wednesday, May 17, 2006 9:32:00 AM, Blogger Raquel said...

There are many natural disasters that happen. The one I will be talking about is hurricanes. Hurricane came from the spanish word used many centuries ago, huracan. There are three main parts of a hurricane. The eye, which is the middle of the hurricane, is usally 20-30 mph. Around the eye is the eye wall, which has the fastest and most violent winds. The feeter bands are bands of rain with gusts of winds. They're the first sign of a coming storm.

These storms are called hurricanes when they form over the Atlantic or eastern Pacific ocean. They are cyclones when they form over the Bay of Bengal and the northern Indian Ocean, and are called typhoons when they deveolop in the western pacific. Hurricanes drop usally around 2.4 trillion gallons of water. They can cause floods, flash floods, and landslides. They can also cause Tsunamis and storm surges. 9 out of 10 hurricanes fatalities are caused by storm surges. That is what I learned about hurricanes by reading Forces of Nature.

 
At Wednesday, May 17, 2006 9:34:00 AM, Blogger Mikey said...

This comment has been removed by a blog administrator.

 
At Wednesday, May 17, 2006 2:52:00 PM, Blogger Rachel W. said...

Hurricanes
" A hurricane is one of three names for a rotating tropical storm with winds of at least 74 miles (119 kilometers) an hour." Hurricanes are capable of destroying coastal areas and causing massive death tolls. 10% of hurricanes lead to thunderstorms. A hurricane can vary in it's size and strength. Hurrivanes can be very dangerous to boaters. A hurricanes' intensity is measured by an instrument called the Saffir-Simpson Scale.

Hurricanes' heavy rain can cause floods, flash floods, and landslides which destroys thousands of homes. A hurricane drops an average of 2.4 trillion gallons of rain per day. More than 6,000 people died in a 20 foot hurricane in Texas. Meteoroligists find a hurricanes' exact location and intensity after it forms. To make an acurate prediction of measure prresure and winds, the forcasters head straight into the storm. or a hurricane to form there needs to be warm ocean water, high humidity, and low pressure.

 
At Friday, May 19, 2006 1:01:00 PM, Blogger Tim B. said...

When you hear that an hurricane is
coming,then you better get as far
as you can get from it,but if it says its coming fast than its called 1. The slowest is number 5.

Hurricanes are formed by extremely hot water.Number 1 can go up to 73 to 95 miles per hour.Number 2 can go up to 96 to 110 miles per hour.Number 3 can go up to 111 to 130 miles per hour.And thats how fast most of the hurricanes go.

 
At Monday, May 22, 2006 9:35:00 AM, Blogger Robert P. said...

March 18,1925.An f5 tornado killed 689 people.It injured 2,000 people.
April 11/12,1965.Tow tornadoe's f4/f5 killed 260 people and injured 3,400 people.May 3,1999.An f3 and f5 tornado came through Oaklahoma.It killed 47 people and injured more than 775.April 28,2002.A f2 tornado came through Maryland.It killed 3 people and injured 122. October17,1989.A magnitude 6.9 earthquake hit California.It killed 63 people and injured 3,800 people.April 18,1906.A magnitude 7.8 had came through San Fransisco.It killed 700 people.

 
At Monday, May 22, 2006 11:35:00 AM, Blogger Jordyn said...

Paragraph 1

My choice of catastrophesis hurricanes. For some reason theny interest me.Hurricanes start from tropical depressions to tropical storms then to hurricanes. Hurricanes most deadliest weapon is water.9 out of 10 deaths are caused by water. Storms surges, floods , flash floods and landslides are dangerous. Landslides can happen far from where a hurricane touches down.


Paragraph 2
Some new things that I learned about huurricanes. 1.) The eye of the stormis the slowest part of the storm. 2.) The eye wall is the worst part of the storm. 3.) The feeter bands are on the outside of the storm and first tell you when it is coming.

 
At Monday, May 22, 2006 4:59:00 PM, Blogger Eric said...

I am learning about tornados. Tornados are violent rotating funnel clouds that extend from the sky to the ground. They are often portended by a dark greenish sky and dark storm clouds. Tornados are really dangerous. Most of the violent tornados come from supercells which are large thunderstorms with winds that are already rotating. Tornados form when warm air collides with cold dry air. The denser cold air is pushed over the warm air, usually producing thunderstorms. The warm air rises through the cold air causing updraft. The updraft will begin to rotate if winds vary in speed or direction. As the rotating updraft called a mesocyclone draws in more warm air from the moving thunderstorms, its rotating speed increases. Cool air is fed by the jetstream, a strong band of wind in the atmosphere provides even more energy. Water droplets from the mesocyclones moist air form a funel cloud. The funnel continues to grow and evntually descends from the cloud, when it touches the ground, it becomes a tornado.

An F5 tornado can have winds above 261 mph and can lift a sturdy house off its foundation. An F4 tornado can have winds from 207 mph to 260 mph and can lift a well structured house off the ground. An F3 has winds from 158 mph to 206 mph and can tear off a roof and some walls of a house. An F2 has winds from 113 mph to 157 mph and can tear off roofs or the frame of a house. An F1 has winds from 73 mph to 112 mph and can peel the surface off a roof. An F0 has winds up to 72 mph and can damage chimneys.

 
At Monday, May 22, 2006 7:03:00 PM, Blogger Drew said...

Tornados are a natural disaster. They are violently rotating columns of air that extend from thunderstorms to the ground. A funnel comes down from a cloud. The funnel hits the ground and sounds like a freight train. Sometimes hail might even fall during a tornado. When a tornado is happening the sky is usually dark with a greenish color. It tears up everything in its path.
I have learned many facts about tornados. Most occur in the United States at nearly 1000 a year. Texas averages 120 a year. I have learned that waterspouts and dust devils are related to tornados. Most tornados form in late afternoon. Massive tornados travel 300 miles per hour. About 70 people are killed each year mostly by flying debris. These are the interesting facts I've learned.

 
At Monday, May 22, 2006 8:42:00 PM, Blogger Tori said...

This comment has been removed by a blog administrator.

 
At Monday, May 22, 2006 8:44:00 PM, Blogger Tori said...

My catastrophe is a volcano. There are many different kinds of volcanoes. For instance, Cinder Cone, Calendera, Composite, Shield, Submarine, Hot Spot, and a Lava Dome volcano. They are all distructive and most of them occur in plate boundaries. Plate boundaries are areas where a lot of rocks smash to the earth.

One thing is you can categorize volcanoes with two words: Explosiveness and viscosity. A fact I learned is that Hot Spot volcanoes are the most studied volcanoes. Every volcano is dangerous. Did you know the most servere volcano is a volcano with high dissolve gasses. Even though volcanoes can be dangerous, to me they are very cool

 
At Tuesday, May 23, 2006 9:26:00 AM, Blogger Audrey said...

My catastrophe is a tornado. Tornadoes are violently rotating storms that extend from a thunderstorm to the ground. The damage ratio can be from F0-F5. Tornadoes destroy everything in their path. The most violent tornadoes come from supercells.Most tornadoes occur in tornado alley.

I learned a lot of new things. I did not know that the most violent tornadoes come from supercells. I didn't know that tornadoes extend from thunderstorms. I learned that there is F0 tornadoes. I thought there was only F1-F5.I Didn't even know there was supercells.

 
At Tuesday, May 23, 2006 11:34:00 AM, Blogger Jacob T. said...

A tornado is a violently rotating column of air. That extends from thunderstorms to the ground. It is also a funnel.Which can sometimes cause hail and snow. Also a tornado tears up everything in its path.

I learned that tornados rated on how much damage they cause and there how fast there winds go. And how wide a tornado can be

 
At Tuesday, May 23, 2006 12:48:00 PM, Blogger Bethany said...

My catastrophe is tornados. A tornado is a violent rotating funnel of air that extends from the sky to the ground.There are many different kinds of natural disasters. The tornado can range from a F0 to a F5.An F0 on the Fujita scale doesn't really do much, but a F5 can really do alot.

I learned that there even was a F0 on the scale. Before I thought it was just a range from a F1 to a F5. I also learned that a F0 does light damage.A F1 does moderate damage.That is what I learned from "National Geographic Forces of Nature" website.

 
At Tuesday, May 23, 2006 12:53:00 PM, Blogger Zac said...

The natural disaster of volcanoes is a very dangerous disaster.The magma inside of it comes out of the top and becomes lava.A few monthes later the lava will become hard rock Each time a volcano erupts it gets bigger.The lava and the ashes rea very hot and they can burn you.

I learned that volcanoes form in the Ring of Fire.The Ring of Fire is along the edge of the Pacific Ocean.There are 5 different kinds of volcanoes.Names of those volcanoes are Cindercone, Caldera, Composite, Shield, Submarine, and lava dome.Volcanoes erupt when gasses, magma, and the molten rock rise toward the surface.

 
At Tuesday, May 23, 2006 1:03:00 PM, Blogger Hanna 31 said...

There are many natural disasters that can occur. Ilearned about TORNADOS. Am tonado is a rotating column of violent air.The worst type of a tornado is a F-5 it causes severe damage. It goes down F-4, F-3, F-2, F-1, F-0,. It goes down by damage too. One other name for a tornado that forms in water is called a water spout.

Now let me tell you what I learned about tornados. I learned how torenados work. I also learned how much damage they can do. I also Learned about some of the scales. Tornados are a interestin natural disaster.

 
At Tuesday, May 23, 2006 1:06:00 PM, Blogger Alex L. said...

Out of four natural disasters I chose volcanoes. Scientists have a scale called a viscoscity scale. Scientists have also categorized volcanoes into 6 categories, Cinder Cone, Lava Dome, Shield, Caldera, Composite, and Sumbarine. Also they have found out how volcanoes erupt,
" Volcanic activity is closely linked with plate tecnotics. As the earths huge plates move and interact in the lithosphere, or the planets outer shell. They trigger a very gradual chain of events that can end with explosions.


One interesting fact about volcanoess is that ancient greeks believed that volcanoes were in the control of gods! Another interesting fact is that there is a band of volcanoes by the pacific ocean called " the Ring of Fire". The three cemicals that are in volcanoes are silica, dissolved gassesm, and magma. But only magma comes out of volcanoes, and when it does come out it turnes it into lava. Also, most volcano eruptions occur at plate boundries, where huge slabs of rock meet in the lithosphere.

 
At Tuesday, May 23, 2006 1:08:00 PM, Blogger Brandon said...

I am learning about tornadoes. A tornado is a violently rotating column of air that extendsfrom a thunderstorm to the ground. You can often seea dark greenish sky. Then black storm clouds gather. All of a sudden a funnel appears, descending from from some clouds. Supercells cause the most violent tornadoes, large thunderstorms that have winds in rotation. Tornadoes form when warm, humid air collides with cold, dry air. The denser cold air is pushed over the warm air, usually cuasing thunderstorms. The warm air rises through the colder air, causing an updraft. This updraft will begin to rotate if the winds vary sharply in speed or direction. As the rotating updraft called a mesocyclone, draws in more warm air from moving thunderstorms, its rotation speed increases. Cool air fed by the jetstream, a strong band of of wind in the atmosphere, provides even more energy. Water droplets from the mesocyclone's moist air form a funnel cloud. The funnel continues to grow and eventually it descends from the cloud. When it touches the ground, it becomes a tornado.

One thing I learned is that dust devils are a small, rapidly rotating columns of air that are made visible by the dust and dirt they pick up. Dust devils are not associated with thunderstorms. Waterspouts are weak twisters that form over warm water. They sometimes move inland and become tornadoes.

 
At Tuesday, May 23, 2006 1:12:00 PM, Blogger Leah said...

There are many nautral disasters and tornados are one of the most violent. Most of these strong stroms come from supercells. The time and place for a tornado can be unpredictable. But we do know that that most tornados accor in the tornado alley around spring time. Horible but interesting true, but these storms reach 300 miles an hour.

Tornados are an amasing nautral disastrer. One thing I noticed is that you really don't want to get caught in a F5. F5 is incredible damage even an F1 is dangerous. For a tornado to happen there must be cold dry air and warm moist air. Also the presure should be falling with the winds variable. If you want my advice watch out for tornados!

 
At Tuesday, May 23, 2006 1:12:00 PM, Blogger Leah said...

There are many nautral disasters and tornados are one of the most violent. Most of these strong stroms come from supercells. The time and place for a tornado can be unpredictable. But we do know that that most tornados accor in the tornado alley around spring time. Horible but interesting true, but these storms reach 300 miles an hour.

Tornados are an amasing nautral disastrer. One thing I noticed is that you really don't want to get caught in a F5. F5 is incredible damage even an F1 is dangerous. For a tornado to happen there must be cold dry air and warm moist air. Also the presure should be falling with the winds variable. If you want my advice watch out for tornados!

 
At Tuesday, May 23, 2006 1:12:00 PM, Blogger Elizabeth said...

Tornado alert! Tornado alert! The siren is heard.

Tornadoes are spinning funnels of air. There is F1, F2, F3, F4, and F5. These are special terms scientists use when measuring a tornadoes speed. A F0 and F1 may do minor damage, but compared to an F5 it is like no damage at all. A F2 have considerable damage. Then there is a F3 and F4. These will do enough damage to cost around $100 dollars per house. A F5 has severe damage and will be so bad, nothing may be left of what was once standing in that area. Most all tornado speeds do damage.

Do you want to know a few interesting facts about tornadoes? Well, I hope so! First, each year, tornadoes kill about 70 people! Damage can cost up to $400 MILLION dollars!! Tornadoes average distence is 660 feet. Their average speed is 30 mph. Did you know every state has experienced at least one tornado? In fact, Texas hasa record of 120! Now I hope you have learned something new about this catastrophe...
tornadoes.

 
At Tuesday, May 23, 2006 3:35:00 PM, Blogger Mikey said...

HURRICANES and TORNADOES

To get a category one this is what it will do it will go 73 to 95
mph.(119 to 153kmh).The danger is minimal damage to vegetion.

Intensity aland fall:Category Two
Top speeds:96 to 110mph(154 to177)kph
Danger:Moderate damage to homes.

Intensity a land fall:Category four
Top speeds:131 to 155mph(210 to 249kmh)
Danger:Extreme stuctural damage.

That is what hurricans are like the
worst storm so if there is one go away fromit pack up and get out of there.So be perpared win it comes.

 
At Wednesday, May 24, 2006 9:16:00 AM, Blogger Troy said...

tornado


A tornado is a twister that comes down from a funel in the sky.A tornado is a big giant that disyroys everything in its path.

A tornado can do more damege by the sice it is.And a tornado can also go out andin the water.and a sine of a tornado is pink cloud in the sky.

 
At Wednesday, May 24, 2006 2:47:00 PM, Blogger Tyler said...

tornadoes form when warm humid air collides with cold dry air. The denser cold air is pushed over the warm usually producing thunderstors. The warm rising through the cold air causing an updraft. This updraft will begin to rotate if winds vary sharply in speed or direction. every year in the united states, tornadoes do about 400 millon dollars in damage and kill about 70 people on average

 
At Wednesday, May 24, 2006 3:11:00 PM, Blogger Chris said...

Hurricanes
There are many natural disaters but I picked to learn about hurricanes.Centuries ago the spanish hurricane, an indigenous word for evil spirts and weather gods.Today "hurricane" is oun of three names for rotating tropical storms.When any kind of hurricane is over an body of water it creates more damage to boater out on water.

Facts I've learned

*Hurricanes can do more damage than a tornadoe.
*More than 6000 people drowned in 1900 when a 20 foot (6 meter) surge flooded Galveston,Texas.

 
At Thursday, May 25, 2006 1:51:00 PM, Blogger Cecilie said...

The catastrophe I chose was earthquakes. One of the resons I chose earthquakes are still being researched. A earthquake is a vibration in the earth's crust. Some earthquakes are even too small to feel without a specials mechines.

There many interesting facts about earthquakes. Like there is four different types of faults. The four faults are strike-slip fault,the dip-slip fault, reverse fault, and the normal fault. The strike-slip fault is a fault that has both plates pushing against each other in oposite directions. TAHE dip-slip fault is when one plate pushes against the other and the second plate pushes down. The reverse fault is two plates pushing in against each other which causes one plate to push up. A normal fault is when both faults push outward. A seismograph measures the damage the storm caused.

 
At Thursday, May 25, 2006 2:12:00 PM, Blogger Rachel L. said...

For my catastrophe I chose hurricanes. Centries ago the spanish used hurrican to name the storms that sank the ships in the carribean. Today hurricane is one of the three names for a rotating tropical storm. Hurricanes form over the Atlantic or eastern Pacific oceans. Cyclones form over the Bay of Bangel and the northern Indian Ocean. Typhoons form in the western Pacific. Hurricanes are a mixture of high humidity and low energy. The safest part of a hurricane is the eye and the most dangerous part is the eye wall.

Some new facts that I learned are what the three names for a rotating tropical storm. I never knew there were three types of it. I also never knew that "hurrican" meant something important to the spanish centries ago. Another thing I learned was that the eye is the safest part of a hurricane. I would think that the middle would be the most dangerous part. I also learned that whatever the name is of the storm, it's always capable of great destruction.

 
At Thursday, May 25, 2006 2:40:00 PM, Blogger Courtney said...

The natural disaster I am choosing is Tornadoes. The reason why I chose this disaster is because tornadoes can appear anywhere as long as there is wind. F0 is the tornado that causes the least amount of damage. F1 does too but it makes more damage than F0. F2 can make some damage but it is deadly. F3 moves 158-206 mph per hour. F4 is very deadly and that moves up to 207-260 mph. F5 is the worst and it is the deadliest. It can be very, very, very destructive. It also makes the most amount of damage that a tornado has ever done so far.

The first thing I learned was that I'm glad that it isn't me in those tornadoes but still I feel sorry for all of the other people who ARE in them. Also I learned that even though before I thought tornadoes couldn't even hurt a person, now I know that the wind speed goes up to 261 miles per hour. And the tornado moves up to 320 feet which is 100 meters.

 
At Thursday, May 25, 2006 3:05:00 PM, Blogger Celia said...

The natural catastrophe I learned about was earthquakes. Earthquakes happen when plates underground shift or break. Most small earthquakes are not noticed by people. But big earthquakes can destroy cities, burst dams,trigger volcanic eruptions, and set off landslides. Some earthquakes are so powerful that they can be felt about 370 miles away. An earthquake has two parts the hypocenter and the epicenter is located on the surface of the earth.

The plates are located on faults. There are four types of faults,Normal, Strike-slip, Reverse, and Dip-slip. Each are either a few inches or hundreds of miles long. They run horizontally, vertically, or indined. All slip apart from each other in different directions to create an earthquake. To pinpoint the surface, or where an earthquake is felt, seismologists only need seismic wave measurment from three recording centers. Every year about 10,000 people die as a result of earthquakes.

 
At Thursday, May 25, 2006 3:19:00 PM, Blogger Miranda said...

My catastrophe is a tornado. I chose a tornado because, I think it is cool to explore what damage the tornado has done. What is in a tornado is the warm air most needs to be full of moisture. Rising presure will prevent the two weather patterns from mixing and that means no tornado. Study winds won't push the updraft rotation and, the cold air moist must be moisture free.

What causes a tornado is a thunderstom already in rotation. Tornado's usually are accompained or preceded by severe thunderstoms,high winds,and hail is also common. Once a tornado hits the ground it may live as little as few seconds or as little as three hours. The average tornado doesn't travel more than six miles ( ten kilometers) before dying out. Most United States occur occur in Tornado Ally. Tornado seson begins in the early Spring for the states along the Gulf of Mexico. Tornados' are most violent in April.

 
At Thursday, May 25, 2006 3:58:00 PM, Blogger Naomi said...

The type of catastrophe I chose is the hurricane. The hurricane is a complex mixure of high humidity and low presure. The word "hurricane" came from the spanish word "hurrican". Theyare called cyclones when they are over the bay of Bengel. Its called a typhoon when it developes in the western pacific. No matter where it developes, it is still a deadly storm.

Here are some facts I learned:
* when a hurricane is over wter they can only create dangourous conditions for boaters
* the winds must be at least 74 mph
* about 100 huricanes happen but only about 10% of them lead to anything but thunderstorms
* most Atlantic Ocean hurricanes form near Cape Verde Islands off the African coast
* disturbances take energy from the warm waters to grow into a tropical depresion.

 
At Friday, May 26, 2006 5:28:00 AM, Blogger Alex C said...

A volcano is a crack in the earth's plate and sometimes lava bubbles upand sprays out the top. Volcanes are rarly active, but when they are they candestroy a city. Most volcanoes are in the ring of fire, 90% of them actually. Volcanes come in many differnt shapes and sizes, but there are only 6 types of volcanoes. I will tell you about those next.
Volcanoes might come in many shape, but in some way there all the same. The first type of volcanoe is the cindercone. This volcanoe has steep sides and looks like a cone. Caldera is the next type, it has steep ovel shaped hills. Composite like the cindercone is shape like a cone and have steep hills. The shield looks like a overturned saucer. Submariens have cone shaped seamouthes, but also come in many diffrernt forms. Lava doumes are just steep mounds! Whether it's shape or size all volcanoes have something in commen.

 
At Friday, May 26, 2006 8:52:00 AM, Blogger Hannah 18 said...

Vocanoes are vents in the earth's surface from which molten rock, debris and steam issue. About 1,900 are known to have been active in historical times. Almost 90% are in the Ring of Fire, a band of volcanoes circling the Pacific Ocean.

Some interesting facts I have learned are that volcanoes can cause draughts. They can also bring benefits, they provide valuable minerals, fertile soils and geothermal energy. Lava flows can also build new land. Most volcanoes occur at plate boundaries. These are just a few reasons I am interested in this subject on National Geographic's Forces of Nature.

 

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