1. Tornadoes
By Sky D. & Caleb B.

2. Wind and air mass
First to create a tornado is a thunder storm which is created by a mass of unstable air mass 
Wind speeds in a tornado can range from 40 to 318 mph
The funnel of the tornado is created when two winds are going in different directions

3. Precipitation and temperature
The temperature around a tornado around the tornado is usually warmer 
Tornados are also caused by warm and cold air masses
Tornados are formed in supercell storms which have hail and down pore 
There is no precipitation that a tornados cause

4. Density                           Pressure
The low density of rising air masses and the high density of sinking air masses cause thunderstorms
Severe thunderstorms have many circulating, density variant pockets of air that are pushed vertically by updrafts
This circulation supports tornado formation
Tornadoes are partly caused by pressure differences in the atmosphere
High pressure air flowing to low pressure air causes the wind

5. Cyclone Direction Fronts
Tornadoes spin cyclonically
They spin counterclockwise in the northern hemisphere
They spin clockwise in the southern hemisphere
Anticyclonic tornadoes are rare and are usually waterspouts
Tornadoes usually occur along with thunderstorms
Thunderstorms commonly happen at the heads of a cold fronts
Tornadoes come from supercells.  
Supercells are " rotating thunderstorms with a well-defined radar circulation called a mesocyclone."  -

6. Works Cited http://www.spc.noaa.gov/faq/tornado/#TOP Edwards, Roger
Nelson, Stephen
tornado.htm W. Bryant, Charles
 NOAA National Severe Storms Laboratory