Guiding Questions: What is stratigraphy? What is the law of superposition? How can archaeologists study stratigraphy to determine the age of archaeological objects? Students will: Explain what stratigraphy is. Describe the law of superposition. Understand how stratigraphy can be used to determine the age of archaeological objects. Preparation Print copy of background materials and the activity sheet for each student. Materials Download Background Information Download Activity – Student Worksheet Download Answer Key Procedure Have students look at the drawing on the Background Information/readi Duration: 30 Minutes.