What happens during a hurricane ? ? plz give some details so i can understand better *i have to make a slid on hurricanes and i need to know what happens during one to be able to full understand*

Hurricanes are intense storms that originate in the Tropics. Hurricanes begin life as a small gathering of unorganized storms which gain energy from the heat of the ocean water. If certain conditions in the atmosphere are present, the gathering of individual clouds will begin to organize into a single storm. If the storm continues to feed off the heat supplied by the ocean, the organization of the cloud clusters will intensify and the winds will increase and circulate around a specific center, the eye. As a matter of fact, meteorologists place hurricanes in a category called cyclones. Cyclones are characterized by a circular wind pattern or circulation. Tornadoes, waterspouts, and dust devils are also members of this category.

During a hurricane, the air pressure decreases. This is the most important characteristic of a hurricane. Now do you think you know when Bertha passed? On July 11, near hour 14. It is at this time that the air pressure was at a minimum. Also, the wind speeds increase when a hurricane approaches. At hour 14, the wind speed and wind gust are near their maximum values of 18 meters/second and 24 meters/second, respectively. Keep in mind that Station 41010 was not near the most dangerous and intense area of the hurricane -- the eye wall. If this station were nearer the eye wall, the wind speeds and gusts would have been much higher and the air pressure would have been much lower.

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.