Four versions of the 2009 Lincoln Bicentennial Penny were minted, each showcasing a unique design on the reverse. The designs represent four different stages in the life of the 16th U.S. president.

Students can understand the mechanism of radioactive half-life and how it helps determine age by experimenting with pennies, dice, and sugar cubes to simulate the radioactive decay of different ...

Why do coins have different values? Coins have different values so you can buy items that cost different amounts. The value of the coin is how much it is worth. You also need different value coins ...