Geologic Time Scale Quiz - Jessica Soria | Library

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Scientists are able to gather evidence about Earth's history through-(2 answers)

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Based on the Geologic Time Scale, the order of the eras of Earth are-

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According to the Law of Superposition-

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These three hills used to be one hill in the past before they separated. Based on the law of superposition, which fossil is the oldest?

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Look at the hill on the right. Based on the law of superposition, which fossil is the youngest?

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Match the era with the correct description.

Draggable item		Corresponding Item
Paleozoic era		The oldest era, 4-2.5 billion years ago, Earth cooled during this time to form continents.
Cenozoic era		2.5 billion years ago to 542 million years ago, the most complex animal to evolve in this era was a jellyfish. Earth was oxygenated in this era.
Archean era		542-252 million years ago; an explosion of life in the ocean at the beginning of this era called the Cambrian explosion defined this time period. The first land plants and reptiles evolved in this era.
Mesozoic era		252-65.5 million years ago; the main life of this era were dinosaurs, mammals, and flowering plants.
Proterozoic era		65.5 million years ago to present; this era is where humans and modern-day mammals evolved.

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Based on your notes and Geologic Time Webquest, write an explanation of how life has evolved on Earth in 4-5 sentences. Describe the patterns of how life has evolved, specifically if life has evolved from simple to diverse OR diverse to simple. Give specific examples for full credit.

Carefully read through the scenario, chart, and prompt before answering the question.

Prompt: Examine the Hermit Shale strata (265 million years ago) and the Toroweap Formation (255 million years ago). Based on the rock strata and the fossils found in each strata, how did the environment and life in the Grand Canyon change over that period of time?

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Write your claim.

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Give the 2 pieces of evidence from the chart that prove your claim.

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Write your reasoning. (For full credit, you should restate your claim, cite at least 2 pieces of evidence, and use the Law of Superposition to explain how your evidence proves your claim.)