Relative Age (Assignment 2 Period 4)

Unravel Earth's history! This worksheet helps 7th graders master relative age dating principles for rock layers.

Q1. Match the vocabulary words to the correct definition Connect the orange circles by dragging the correct word to the definition. Relative Dating A process to determine the age of a material in relation to surrounding materials. Law of Superposition The oldest rock layer will be at the bottom and the youngest will be at the top Cross-Cutting Principle If an igneous intrusion or fault cuts through a rock, it is always younger than the rock it has cut across. The Principle of Uniformitarianism Geologic processes are the same today as they are in the past ("The present is the key to the past") The Principle of Unconformities Wavy or incomplete lines in rock layers due to erosion or missing rocks. Represent gaps in the geologic time record. Q2. How does sedimentary rock usually form? Vertically Diagonally Folding Horizontally Q3. Letter "F" is a(n)........... inclusion fault intrusion unconformity Q4. What is the most likely order of the rock layers in the picture below? (from oldest to youngest) A,B,C, D Layers were then broken by a fault. C,B,A,D Layers were then broken by a fault. Layers were first broken by a fault. C, B, A, D then formed None of the above. Q5. Oldest to Youngest Label the tagged layers from oldest to youngest.1=oldest4=youngest(use numbers 1,2,3,4 only - do not write numbers out) 3 2 4 1