v1	v2	v3	v4	v5	v6	v7	v8	v9	v10	v11	v12	v13	v14	v15
					5.11									
					<<<<									
					Pieces of ice that form on land, and then float off into an ocean or lake, are called icebergs.									
					They come in a variety of sizes.									
					But, the term iceberg only refers to chunks of ice larger than sixteen feet across.									
					Yet, the iceberg we see is just a small part of these icy chunks.									
					Up to 90% of each iceberg's mass is underwater.									
					<<<<									
					Smaller icebergs have funny nicknames.									
					They're often referred to by ship workers as bergy bits or growlers.									
					So, the next time you want ice for your soda, say to your mom, "Can I have a growler?"									
					She won't know what you're talking about.									
					But, you will.									
					<<<<									
					To be sure, small icebergs are the most dangerous.									
					They are tough to spot in the water, at times.									
					When ships crash into them, they can cause lots of damage.									
					In fact, icebergs have sunk many vessels in the history of sea travel.									
					<<<<									
					The most famous incident is the sinking of the Titanic--a huge passenger boat.									
					It sunk near Newfoundland in the year 1912.									
					Hollywood even made a big budget movie about it.									
					That's right--one of the most successful flicks of all is about an iceberg taking down a ship!									
					<<<<									
					Icebergs form when chunks of ice break from glaciers or ice shelves.									
					They begin in the North Atlantic or Antarctica.									
					And, in case you're wondering, sometimes penguins do live on icebergs.									
					But, they can't do so for long.									
					<<<<									
					After a while, icebergs drift and travel with ocean currents.									
					On occasion they will even smash up against shore in seaside communities.									
					Of course, when icebergs reach warmer waters, they melt into liquid.									
					This, in turn, slowly raises the level of the sea.									
					<<<<									
					Icebergs are clearly a danger to sea travelers.									
					So, what can people do to help stop tragedy from happening?									
					It turns out The International Ice Patrol uses airplanes and radar signals to track icebergs.									
					They are often able to warn ocean liners of these hazards ahead of time.									
					<<<<									
					This helps boats around major shipping lanes steer away from icebergs.									
					Also, The U.S. National Ice Center uses satellite data to watch icebergs.									
					But, they only track lumps of ice larger than 5,400 square feet.									
					It takes the effort of many people to keep ocean travel safe from these chunks of frozen water.									
					<<<<									
					Our planet is slowly becoming a warmer place to live.									
					That means more icebergs are breaking away than ever.									
					As this trend continues, expect to hear a lot more news about icebergs in the future.									
					<<<<