useless trivia: What Word Means: The Wild Turnip?

Questions

--------------- use wooden "eyeglasses" with narrow slits for eyepieces to protect their eyes from glare reflected by ice and snow.?

Filled with water, gas, electric, telephone, cable, steam, and sewer lines, ------------- is the most dense underground site in the United States.?

-------------- has the greatest number of islands in the world: 179,584.?

------------ averages the greatest number of shark attacks annually - an average of 13.?

Florida is not the southernmost state in the United States. ----------- is farther south.?