Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 18, Problem 11QAP
To determine
The meaning of Cambrian explosion.
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d. all) of these
7. The development of ozóne in the stratosphere and oxygen in the atmosphere first
made possible the development of
a. complex organisms
b. single-cell organisms
c. cyanobacteria
d. all of these
8. Today, many scientists think that
a. 'birds evolved from dinosaurs
b. dinosaurs evolved from reptiles
c. birds evolved from amphibians
d. both a andb
9. Ediacaran organisms first appeared during the
a. Precambrian Time
b. Cambrian Period
c. Permian Period
d. none of these
10. As
a. cyanobacteria
b. trilobites
evolved, they changed Earth's atmosphere by producing oxygen.
c. reptiles
d. dinosaurs
Geologic Time
What describes using organisms that were only alive during a specific time period to estimate the unknown age of items?
a.
Radioactive dating
Selected:b.
Law of superposition
This answer is incorrect.
c.
Relative dating
d.
Index fossils
3. The Duggs find the skeleton of a Zillow beast and wish to carbon date it. If the half life of Carbon-14
is 5700 years, and we measure 60% of the original carbon, how old is the Zillow beast fossil?
Chapter 18 Solutions
Understanding Our Universe
Ch. 18.1 - Prob. 18.1CYUCh. 18.2 - Prob. 18.2CYUCh. 18.3 - Prob. 18.3CYUCh. 18.4 - Prob. 18.4CYUCh. 18 - Prob. 1QAPCh. 18 - Prob. 2QAPCh. 18 - Prob. 3QAPCh. 18 - Prob. 4QAPCh. 18 - Prob. 5QAPCh. 18 - Prob. 6QAP
Ch. 18 - Prob. 7QAPCh. 18 - Prob. 8QAPCh. 18 - Prob. 9QAPCh. 18 - Prob. 10QAPCh. 18 - Prob. 11QAPCh. 18 - Prob. 12QAPCh. 18 - Prob. 13QAPCh. 18 - Prob. 14QAPCh. 18 - Prob. 15QAPCh. 18 - Prob. 16QAPCh. 18 - Prob. 17QAPCh. 18 - Prob. 18QAPCh. 18 - Prob. 19QAPCh. 18 - Prob. 20QAPCh. 18 - Prob. 21QAPCh. 18 - Prob. 22QAPCh. 18 - Prob. 23QAPCh. 18 - Prob. 24QAPCh. 18 - Prob. 25QAPCh. 18 - Prob. 26QAPCh. 18 - Prob. 27QAPCh. 18 - Prob. 28QAPCh. 18 - Prob. 29QAPCh. 18 - Prob. 30QAPCh. 18 - Prob. 31QAPCh. 18 - Prob. 32QAPCh. 18 - Prob. 33QAPCh. 18 - Prob. 34QAPCh. 18 - Prob. 35QAPCh. 18 - Prob. 36QAPCh. 18 - Prob. 37QAPCh. 18 - Prob. 38QAPCh. 18 - Prob. 41QAPCh. 18 - Prob. 42QAPCh. 18 - Prob. 43QAPCh. 18 - Prob. 44QAPCh. 18 - Prob. 45QAP
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