Generate a class discussion about government regulation and deregulation in a free market economy. Ask students to come up with examples of other times the government has intervened to control business practices, establish rules, or breakup monopolies. Discuss how the economic principle of substitution could apply in this situation. Describe the appearance of these fossils. 2.A fossil is any evidence of ancient life.
Scientists often categorize fossils as either trace fossils or body fossils.
A trace fossil is any indirect evidence of ancient life that indicates a kind of behavior, such as tracks, trails, burrows, eggs, and nests. Introduce students to these two kinds of fossils and have them conduct research to learn more about types of trace fossils. Have students share and discuss their lists. Give reasons to support your answer. Divide the class into two groups, based on their answers to the previous question.