Density and the Titanic

Density is what makes something float or sink. The Titanic was thought to be unsinkable, until it hit an iceberg, and sank. The Titanic was made so if one level filled with water, it would still float. When the iceberg scraped the sides of the ship, it made holes on several levels. When the water flooded in, the Titanic had the same amount of space as it did before, but the water made it denser.  The water flooded in and first it tilted, then was verticle, then it was too much weight the ship could bear so it broke in half and sank. If the iceberg hadn't hit so many levels, it could have maybe survived with the thousands of people on it. Most icebergs are bigger under the surface. Often, the visible part is only a fraction of the size, thus the expression, the tip of the iceberg. The lower section of the iceberg is completely invisible, so the captain didn't know were it was. It was dark and he couldn't  see the iceberg until he almost collided with it. He tried to steer it away, but the lower decks got hit and let the water in. The water flooding in made it too dense to float. So, it sank, and took hundreds of people to the depths of the Atlantic ocean because there simply wasn't enough life boats.