21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 24, Problem 5QP
To determine
Reasons that terrestrial life may originated from Earth’s oceans, rather than from land.
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The Oldest Snack Food? In Bat Cave, New Mexico, archaeologists found ancient human remains,including cobs of popping corn whose C14-to-C12 ratio was approximately 48% of that found in living matter.Estimate the age of the corn cobs
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Chapter 24 Solutions
21st Century Astronomy
Ch. 24.1 - Prob. 24.1CYUCh. 24.2 - Prob. 24.2CYUCh. 24.3 - Prob. 24.3ACYUCh. 24.3 - Prob. 24.3BCYUCh. 24.4 - Prob. 24.4CYUCh. 24 - Prob. 1QPCh. 24 - Prob. 2QPCh. 24 - Prob. 3QPCh. 24 - Prob. 4QPCh. 24 - Prob. 5QP
Ch. 24 - Prob. 6QPCh. 24 - Prob. 7QPCh. 24 - Prob. 8QPCh. 24 - Prob. 9QPCh. 24 - Prob. 10QPCh. 24 - Prob. 11QPCh. 24 - Prob. 12QPCh. 24 - Prob. 13QPCh. 24 - Prob. 14QPCh. 24 - Prob. 15QPCh. 24 - Prob. 16QPCh. 24 - Prob. 17QPCh. 24 - Prob. 18QPCh. 24 - Prob. 20QPCh. 24 - Prob. 21QPCh. 24 - Prob. 22QPCh. 24 - Prob. 23QPCh. 24 - Prob. 24QPCh. 24 - Prob. 25QPCh. 24 - Prob. 26QPCh. 24 - Prob. 27QPCh. 24 - Prob. 29QPCh. 24 - Prob. 30QP
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- Why do scientists generality think that liquid water is necessary for the origin of life?arrow_forwardWhat would happen to a life-form if the information handed down to offspring was always the same? How would that endanger the future of the life-form?arrow_forwardWhat would happen to a life-form if the genetic information handed down to offspring was copied extremely inaccurately? How would that endanger the future of the life-form?arrow_forward
- From Hawaii to the bend in the Hawaiian-Emperor chain is about 4000 km. Use the speed of Pacific plate motion given in Problem 7 to estimate how long ago the direction of plate motion changed. (Note: It may not be a coincidence that the San Andreas fault became active in what is now Southern California at about the same time.) 7. The Hawaiian-Emperor chain of undersea volcanoes is about 7500 km long, and the Pacific plate is moving 9.2 cm a year. How old is the oldest detectable volcano in the chain? What has happened to older volcanoes in the chain?arrow_forwardIf you represent Earth’s history by a line 1 m long, how long a segment would represent the 400 million years since life moved onto the land? How long a segment would represent the 4-million-year history of human life?arrow_forwardIf life is based on information, what is that information?arrow_forward
- How Do We know? The evidence is overwhelming in support of the idea that the Grand Canyon was dug over a span of millions of years by the erosive power of the Colorado River and its tributary streams. Is that a catastrophic theory or an evolutionary theory?arrow_forwardDetail some of the anthropogenic changes to Earth’s climate and their potential impact on life.arrow_forwardGive an example of natural selection acting on new DNA patterns to select the most advantageous characteristics.arrow_forward
- Describe one special quality of water that makes it the basis for life on Earth.arrow_forwardWhy are so few fossils of worms found?arrow_forwardTectonic plates are large segments of Earth’s mist that move slowly. Suppose one such plate has an average speed of 4.0 cm/yr. (a) What distance does it move in 1.0 s at this speed? (b) What is its speed in kilometers pet million years?arrow_forward
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