Friday, November 14, 2008

Global Warming

Have you heard of global warming? It' happening right now! Earth may soon, in only 10,000 years, earth will become
like Venus, because from our atmosphere, that lets sunlight go in, but not come out.
If the procces continues, Greenland and antarctica will melt, causing flooding in lowland areas,
and more hurricanes, tornadoes, and drought. Then, if the sea level rises 5 feet, cities like New York, Miami and Seattle will be under water.

Tuesday, August 12, 2008

El Nino


El Nino can be very bad. It can cause storms in California, Floods in North America, droughts in southern Europe, And extremley hevy rain in the pacific. El Nino happens when strong vlcanoes erupt, and comes in December, around Christmas.

Thursday, July 31, 2008

Hurricanes


Hurricanes are very strong. They can reach a speed of 200 mph. When they hit land,

they destroy homes and buildings. Hurricanes are swirling, heavy rainstorms that usually hit the atlantic ocean and gulf of Mexico. When the eye of the storm comes, it gets sunny. But do not be fooled. The rain comes back. Hurricanes last for 2 days or more.

Wednesday, June 11, 2008

Supercells


Supercells can cause F-5 tornadoes. They are stronger than F-1 and F-2 tornados. A supercell forms when warm moist air rises an cold dry air mixes in. Supercells come from clouds called cumulonimbus.

Tornadoes


Tornadoes are dangeruos. Some are strong and some are weak.
The Fijita tornado scale rates tornadoes. Here is how it rates them:
F-1:40-72 mph: It can damage chimneys and brake branches off trees.
F-2:72-118 mph: It can brake roofs off houses.
F-3:118-206 mph: It can toss trains and overturn mobile homes.
F-4:206-302 mph: It can toss cars and trains into the air and drop them miles away.
F-5:302-373 mph: It can toss houses into the air.