Rocks become smoother as rough and jagged edges break off. Students run a model of this process by shaking sugar cubes and gravel together in a plastic container. The sugar cubes become smoother as their edges break off when they collide in the container.
By Diane Alter, Contributing Writer, Money Morning -. Gold prices today (Friday) climbed $18.90, or $1.66%, at $1,158.90, which was a six-week high for the precious metal. Gold prices today climbed after the release of the latest Federal Open Market Committee (FOMC) minutes.
2 year gold price history in US Dollars per ounce. ^Top. 5 year gold price history in US Dollars per ounce. ^Top. 10 year gold price history in US Dollars per ounce. ^Top. 15 year gold price history in US Dollars per ounce. ^Top. 20 year gold price history in US Dollars per ounce.