FLAG: The flag consists of 13 alternate stripes, 7 red and 6 white; these represent the 13 original colonies. Fifty 5-pointed white stars, representing the present number of states in the Union, are placed in 9 horizontal rows alternately of 6 and 5 against a blue field in the upper left corner of the flag. The right talon clutches an olive branch, representing peace; in the left are 13 arrows, symbolizing military strength. The eagle's beak holds a banner with the motto "E pluribus unum" From many, one ; overhead is a constellation of 13 five-pointed stars in a glory. The pyramid stands on a grassy ground, against a backdrop of mountains.
Description: With the Half-Life Laboratory, students gain a better understanding of radioactive dating and half-lives. Students are able to visualize and model what is meant by the half-life of a reaction. By extension, this experiment is a useful analogy to radioactive decay and carbon dating. This experiment is best used by student working in pairs.