Life in the Universe, Books a la Carte Plus Mastering Astronomy with Pearson eText -- Access Card Package (4th Edition)
4th Edition
ISBN: 9780134394411
Author: Bennett
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 30TYU
We discover an asteroid about 300 meters across that is on a collision course with Earth.
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Chapter 6 Solutions
Life in the Universe, Books a la Carte Plus Mastering Astronomy with Pearson eText -- Access Card Package (4th Edition)
Ch. 6 - What are the three lines of fossil evidence that...Ch. 6 - How do studies of DNA sequences allow us to...Ch. 6 - Based on current evidence, what locations on Earth...Ch. 6 - What was the MillerUrey experiment, and how did it...Ch. 6 - What do we mean by an RNA world, and why do...Ch. 6 - Briefly summarize current ideas about the sequence...Ch. 6 - Briefly discuss the possibility that life migrated...Ch. 6 - Why do we think that evolution would have...Ch. 6 - Briefly discuss the early evolution of life, from...Ch. 6 - How do we think that eukaryotes evolved? What time...
Ch. 6 - What was the Cambrian explosion? Briefly discuss...Ch. 6 - How and when did life colonize land? Why did it...Ch. 6 - How do we know that the early Earth could not have...Ch. 6 - Summarize the history of the oxygen buildup as it...Ch. 6 - What was the KT impact, and how is it thought to...Ch. 6 - Briefly discuss the evidence for other mass...Ch. 6 - Discuss the threat that future impacts may pose to...Ch. 6 - Describe several adaptations that evolved so...Ch. 6 - When did hominids arise, and when did modern...Ch. 6 - Briefly describe and clarify a few common...Ch. 6 - Prob. 21RQCh. 6 - Briefly describe two main approaches to creating...Ch. 6 - We discover evidence of life, in the form of a...Ch. 6 - We discover an intact fossil of a eukaryotic cell,...Ch. 6 - We discover a preserved, 3.5-billion-year-old...Ch. 6 - We discover clear evidence that life arose on a...Ch. 6 - We discover a fossil of a large dinosaur that...Ch. 6 - We discover that, contrary to present belief,...Ch. 6 - We discover a crater from the impact of a...Ch. 6 - We discover an asteroid about 300 meters across...Ch. 6 - We find fossil remains of an early primate that...Ch. 6 - The first life created in the laboratory has an...Ch. 6 - The origin of life on Earth most likely occurred...Ch. 6 - The earliest living organisms probably were (a)...Ch. 6 - Prob. 35TYUCh. 6 - RNA world refers to (a) the possibility that life...Ch. 6 - Early life arose in an oxygen-free environment,...Ch. 6 - The oxygen in Earths atmosphere was originally...Ch. 6 - The Cambrian explosion refers to (a) a dramatic...Ch. 6 - Prob. 40TYUCh. 6 - The hypothesis that an impact killed the dinosaurs...Ch. 6 - According to the fossil evidence, modern humans...Ch. 6 - Origin of Life Studies. We cannot go back in time...Ch. 6 - A Brief History of Life on Earth. Take all the...Ch. 6 - Geology and Life. In Chapter 4, we discussed the...Ch. 6 - Prob. 48IFCh. 6 - Prob. 49IFCh. 6 - Impact Movie Review. Watch one of the Hollywood...Ch. 6 - Artificial Life Review. Numerous science fiction...Ch. 6 - Bacterial Evolution. Suppose that a mutation...Ch. 6 - Deep in Bacteria. In Cosmic Calculations 6.1, we...Ch. 6 - Prob. 54IFCh. 6 - Human Population Growth. During the twentieth...Ch. 6 - Impact Energy. Consider a comet about 2 kilometers...Ch. 6 - The Missing Link. As we discussed in this chapter,...Ch. 6 - Evolution by Choice. Consider the technology we...
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- You analyze a sample of a meteorite that landed on Earth and find 15/16 of a certain type of radioactive atoms have decayed into the corresponding daughter atom. Calculate the number of half-lives that have occurred.arrow_forwardList any similarities between discovered exoplanets and planets in our solar system.arrow_forwardDo you think scientists should make plans to defend Earth from future asteroid impacts? Is it right to intervene in the same evolutionary process that made the development of mammals (including us) possible after the big impact 65 million years ago?arrow_forward
- Some meteorites contain organic molecules. What does that mean?arrow_forwardWhich meteorites are the most useful for defining the age of the solar system? Why?arrow_forwardWhat revisions to the theory of planet formation have astronomers had to make as a result of the discovery of exoplanets?arrow_forward
- What evidence do we have for the existence of the Kuiper belt? What kind of objects are found there?arrow_forwardWhy do astronomers conclude that asteroids were never part of a full-sized planet?arrow_forwardWhy are asteroids and comets important to our understanding of solar system history?arrow_forward
- Comet Halleys Orbital Parameters Figure 8.1 shows Comet Halleys elliptical orbit. a. Use the information given in the case study above and Keplers third law from Chapter 7 to find the semimajor axis a of Comet Halleys orbit. b. The comets perihelion distance is rP = 0.59 AU. Find its aphelion distance (farthest point from the Sun).arrow_forwardThe ___________________ meteorites could have formed in the crust of a large asteroid that was later fragmented. a. chondrite b. iron c. achondrite d. M-type e. chondrulearrow_forwardOn February 15, 2013, Asteroid 2012 DA14 passed within 17,200 miles [mi] of the surface of the Earth at a relative speed of 7.8 kilometers per second [km/s]. This is considerably closer than the orbit of geosynchronous satellites (26,200 miles). This is the closest recorded approach of an object this large. The asteroid 2012 DA14 was estimated to have a diameter of 30 meters [m] and a specific gravity of 3. If 2012 DA14 had hit the Earth, what is the total amount of energy that would have been released (i.e., what was the kinetic energy of the asteroid)? Express your answer in megatons [Mton]. One megaton is the energy released by one million metric tons of TNT explosive. A metric ton equals 1,000 kilograms [kg], and the explosive energy of TNT is 4,184 joules per gram [J/g].arrow_forward
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