5. What does relative dating depend on to identify similarly aged rocks in different locations? A. the kinds of fossils found in the rock C. the mineral composition of the rock B. the radiometric age of the rocks D. the position of the rock layer 6. The amount of time it takes for half of a radioactive isotope to decay is known as the A. isotope. B. half-life C. product. D.radiocarbon 7. The Age of Reptiles is a term often used to describe the A. Mesozoic era. B. Paleozoic era. C. Cenozoic era D. Precambrian 8. Which era of Earth's history could be named the Age of fishes? A. Cenozoic Era B. Mesozoic Era C. Paleozoic Era D. Precambrian __ 9. What was the significance of the Cambrian explosion to the evolution of life on Earth? A. It was a mass extinction during which nearly 90% of marine species were lost. B. It was a rapid diversification of the ancestors of most major animal groups. C. It was caused by tectonic instability, resulting in an eruption of multiple volcanoes. D. It was the event in which life began, but no fossils survive, and little is known.

Question

5. What does relative dating depend on to identify similarly aged rocks in different locations? A. the kinds of fossils found in the rock C. the mineral composition of the rock B. the radiometric age of the rocks D. the position of the rock layer 6. The amount of time it takes for half of a radioactive isotope to decay is known as the A. isotope. B. half-life C. product. D.radiocarbon 7. The Age of Reptiles is a term often used to describe the A. Mesozoic era. B. Paleozoic era. C. Cenozoic era D. Precambrian 8. Which era of Earth's history could be named the Age of fishes? A. Cenozoic Era B. Mesozoic Era C. Paleozoic Era D. Precambrian __ 9. What was the significance of the Cambrian explosion to the evolution of life on Earth? A. It was a mass extinction during which nearly 90% of marine species were lost. B. It was a rapid diversification of the ancestors of most major animal groups. C. It was caused by tectonic instability, resulting in an eruption of multiple volcanoes. D. It was the event in which life began, but no fossils survive, and little is known.

Answer 1

__ 5. What does relative dating depend on to identify similarly aged rocks in different locations?D. the position of the rock layerRelative dating relies on the principle of superposition, which states that in an undisturbed sequence of rock layers, the older layers will be on the bottom and the younger layers will be on top. Therefore, the position of the rock layer is crucial for identifying similarly aged rocks in different locations.__ 6. The amount of time it takes for half of a radioactive isotope to decay is known as theB. half-lifeThe half-life is the time it takes for half of the atoms in a sample of a radioactive isotope to decay. It is a measure of the rate of decay of the isotope and is used in radiometric dating to determine the age of rocks and fossils.__ 7. The Age of Reptiles is a term often used to describe theA. Mesozoic era.The Mesozoic era, which lasted from approximately 252 million years ago to 66 million years ago, is often referred to as the Age of Reptiles. This era saw the dominance of reptiles, including dinosaurs, and was characterized by the rise and fall of various reptilian species.__ 8. Which era of Earth's history could be named the Age of fishes?C. Paleozoic EraThe Paleozoic era, which lasted from approximately 541 million years ago to 252 million years ago, is often referred to as the Age of Fishes. This era saw the diversification and dominance of fish, with the emergence of various fish species and the development of complex ecosystems in the oceans.__ 9. What was the significance of the Cambrian explosion to the evolution of life on Earth?B. It was a rapid diversification of the ancestors of most major animal groups.The Cambrian explosion, which occurred approximately 541 million years ago, was a period of rapid diversification and evolution of multicellular organisms. During this time, many of the major animal groups that exist today first appeared, leading to the development of complex ecosystems and the foundation for the evolution of life on Earth.

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