During what geologic age were trilobites and brachiopods most dominant?

During what geologic age were reptiles such as dinosaurs most dominant?

During what geologic age were mammals most dominant?

Which of the following states that each rock layer is older than the one above it. So, the relative age of the rock or fossil in the rock or fossil in the rock is older if it is farther down in the rock layers?

Which of the following is NOT a characteristic of an index fossil?

Which of the following is a way scientists determine the age of ancient rocks and fossils?

Which of the following is theorized to have caused the the extinction of many dinosaurs at the end of the Mesozoic era?

Which of the following is theorized to have caused the greatest mass extinction in Earth's history at the end of the Paleozoic era?

Which of the following is theorized to have caused many mass extinctions during the Cenozoic era?

Which of the following orders geologic time accurately from largest to smallest?

Which of the following would favor fossil formation?

Which of the following is something fossils DO NOT tell scientists about Earth's past?

Which of the following would be the LEAST likely to fossilize?

Which of the following would be the MOST likely to fossilize?

Which of the following describes the collection of millions of fossils and their placement in chronological order ?

Which of the following is a trait or behavior that helps and organism survive and reproduce?

Which of the following describes the process that explains how a species of organisms can change over geologic time?

Which of the following is NOT a physical trait that enhances an organisms ability to survive and reproduce?

Which of the following is NOT a man-made extinction factor in recent geologic time?

Which of the following is NOT a natural extinction factor?

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