Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 26.1, Problem 1CC
Summary Introduction
To determine: The oldest rock layer in the given photo.
Introduction: Sedimentary rocks are formed from particles of older rocks broken apart by water or wind. The particles may be in the form of gravel, sand or mud. These particles subsequently settle and bury living and dead organisms at the bottom of rivers, lake, and oceans. Eventually, the sediments at the bottom of the pile become rock. The lower layers are usually older than the upper layers in a sequence of layered rock.
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Given the life-style we live today, what pre-historic period gives us the ability to heat our homes, run our cars and have a comfortable life
Group of answer choices
Jurassic
neogene
carboniferous
Cambrian
A scientist has a fossil that was found in a layer of rock close to Earth’s surface. He believes that the fossil is around 12,000 years old.
Which method would best allow the scientist to confirm the actual age of the fossil?
finding another fossil in a deeper layer of rock
finding another fossil in the same layer of rock
using carbon/nitrogen absolute dating
using potassium/argon absolute dating
FILL IN THE BLANKS
Biologists most often use ____________ for radioisotope dating, but its half-life is relatively ____________.
Relative dating determines the relative age of rocks/fossils by ____________ them to known older or younger layers.
Chapter 26 Solutions
Biology
Ch. 26.1 - Prob. 1CCCh. 26.1 - Prob. 2CCCh. 26.2 - Prob. 1CSCh. 26.2 - Prob. 1CCCh. 26.2 - Prob. 2CSCh. 26.3 - What are the defining features of primates?Ch. 26.3 - Core Skill: Modeling The goal of this modeling...Ch. 26 - Prob. 1TYCh. 26 - Prob. 2TYCh. 26 - Prob. 3TY
Ch. 26 - The endosymbiosis hypothesis explaining the...Ch. 26 - Prob. 5TYCh. 26 - Which of the following explanations of...Ch. 26 - Prob. 7TYCh. 26 - Prob. 8TYCh. 26 - Prob. 9TYCh. 26 - Which of the following statements regarding modern...Ch. 26 - Prob. 1CQCh. 26 - Prob. 2CQCh. 26 - Core Concept: Evolution Describe two examples in...Ch. 26 - Discuss the factors that have contributed to the...Ch. 26 - Discuss how the human body has changed since the...
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- True or false? Wrinkly textures in rock that formed from ancient biofilms living in marine sediments are considered trace fossils.arrow_forwardImagine you were asked to excavate fossils from deposits near the top of the Grand Canyon and near the bottom . Predict any pattern you would expect to find in the fossilsarrow_forwardWhich of the following statements is incorrect in the context of fossilization? Minerals dissolved in the water gradually replace minerals in bones Sediments that slowly accumulate on top of the site extert increasing pressure Extreme pressure transforms the mineralized remains into rock. Impressions form detailed imprints of only external structures. Mineral particles settle out of the groundwater and crystallize inside cavities.arrow_forward
- The map below shows how the continents once were connected together (link to bigger map if you need it (Links to an external site.)). Based on the map and biogeography, where would we expect to find animals and fossils that were closely related to animals from Brazil? A. Nigeria B. Russia C. Canada D. Indiaarrow_forwardComparison of carbon -14 and nitrogen -14 in sample Age of fossils in yearsarrow_forwardWhich statement is true? Recent remains of plants or animals on topsoil are fossils. Imprints of leaves or footprints in sedimentary rock are fossils. Insects preserved in hardened tree sap are not fossils. Petrified skeletal bones from an ancient mammal are not fossilsarrow_forward
- Plate tectonics were a major factor in shaping life on this planet. Explain how plate tectonics can both increase and decrease species diversityarrow_forwardWhich of these geologic time periods have been defined by a major extinction event? Select all that apply. Permian Jurassic Quaternary Cretaceous Cambrianarrow_forwardWhich of the following is not a fossil?a. Dried-out animal bones in a layer of desert sandb. A patch of fur encased in amberc. A woolly mammoth frozen in Arctic permafrostd. Remains of an extinct whalelike animale. The impression of a plant leaf in sandstonef. The wrinkly texture of shale imprinted withbiofilms in sedimentsarrow_forward
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Fossil: The Language & History of Paleontology; Author: Alliterative;https://www.youtube.com/watch?v=x9yNwRBlKtU;License: Standard youtube license