BIOLOGY Unit 12: Geologic Time Scale PRACTICE TEST
____1.Which of the following characteristics must a good index fossil have?
a. / very rare, easy to identify, existed for a brief time, occurs in a local areab. / somewhat rare, hard to identify, existed for a brief time, widespread
c. / common, hard to identify, existed for a long time, widespread
d. / very common, easy to identify, existed for a brief time, widespread
____2.What do scientists estimate as the age of Earth?
a. / 100 million years old / b. / 4.6 billion years old / c. / 10 billion years old / d. / 3.8 million years old____3.The Miller-Urey experiment demonstrated that
a. / organic molecules first could have come to Earth on a meteorite.b. / iron-sulfide bubbles may have acted as the first cell membranes.
c. / liposome membranes containing organic molecules preceded true cells.
d. / energy from lightning might have helped create Earth's first organic molecules.
____4.Scientists hypothesize that cyanobacteria changed the early Earth by
a. / adding oxygen to the atmosphere. / c. / turning into eukaryotic cells.b. / developing endosymbiotic relationships. / d. / getting energy from organic molecules.
____5.The evolution of sexual reproduction resulted in
a. / decreased diversity. / c. / genetically identical offspring.b. / slower rate of evolution. / d. / increased genetic variation.
____6.The first land organisms emerged during the
a. / Cretaceous period. / b. / Paleozoic era. / c. / Mesozoic era. / d. / Tertiary period.____7.The Age of Reptiles is a term often used to describe the
a. / Mesozoic era. / b. / Paleozoic era. / c. / Cenozoic era. / d. / Precambrian Time.____8.Which unit of geologic time followed the mass extinction of dinosaurs?
a. / Cambrian period / b. / Jurassic period / c. / Mesozoic era / d. / Cenozoic era____9.What group of animals includes modern humans?
a. / reptiles / b. / trilobites / c. / primates / d. / marsupials____10.Fossil evidence suggests Homo sapiens first appeared
a. / 4 million years ago. / c. / 10,000-20,000 years ago.b. / 100,000-200,000 years ago. / d. / 20 million years ago.
Short Answer
11.Which unit of geologic time in Figure 12.3 is the oldest?
12.Which is the smallest unit of geologic time in Figure 12.3 that includes the present time?
13.The largest mass extinction in Earth's history occurred 248 million years ago. What ERAS of geologic time did this event divide?
14.A group of fossils that look similar to modern organisms would most likely be found from which era?
15.What periods make up the Paleozoic era?
Use the exhibit to answer the questions that follow.
16.Which of the species shown in Figure12.4 could have lived at the same time?
17.On an archeological expedition to Colorado, a hominid skull is found that is dated as 10,000 years old. What species is the skull most likely from?
____18.If the entire history of the Earth could be compared to an hour of time, for what portion of this hour would humans exist on Earth?
a. / 50 minutes / b. / 10 minutes / c. / 1 minute / d. / less than 1 second____19.What were the first living things on Earth?
a. / algae / b. / plants / c. / bacteria / d. / fish____20.What is the name of the object that is used to compare the age of fossils found in layers of the Earth?
a. / fossil / b. / index fossil / c. / carbon-14 / d. / trilobiteBIOLOGY Unit 12: Geologic Time Scale PRACTICE TEST
Answer Section
1.ANS:DPTS:1DIF:Level AREF:act0976aaf18007e16b_390
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
2.ANS:BPTS:1DIF:Level AREF:act0976aaf18007e16b_414
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
3.ANS:DPTS:1DIF:Level AREF:act0976aaf18007e16b_422
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
4.ANS:APTS:1DIF:Level AREF:act0976aaf18007e16b_430
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
5.ANS:DPTS:1DIF:Level AREF:act0976aaf18007e16b_457
STA:FL.NGSSS.SCI.08.9-12.SC.912.L.16.17TOP:Ch 12 Test - A
NOT:978-0-618-78317-5
6.ANS:BPTS:1DIF:Level AREF:act0976aaf18007e16b_465
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
7.ANS:APTS:1DIF:Level AREF:act0976aaf18007e16b_473
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
8.ANS:DPTS:1DIF:Level AREF:act0976aaf18007e16b_481
STA:FL.NGSSS.SCI.08.9-12.SC.912.L.15.3 | FL.NGSSS.SCI.08.9-12.SC.912.L.17.8
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
9.ANS:CPTS:1DIF:Level AREF:act0976aaf18007e16b_489
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
10.ANS:BPTS:1DIF:Level AREF:act0976aaf18007e16b_495
STA:FL.NGSSS.SCI.08.9-12.SC.912.L.15.10 | FL.NGSSS.SCI.08.9-12.SC.912.L.15.11
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
11.ANS:
Precambrian time
PTS:1DIF:Level AREF:act0976aaf18007e16b_504
STA:FL.NGSSS.SCI.08.9-12.SC.912.N.1.1.6TOP:Ch 12 Test - A
NOT:978-0-618-78317-5
12.ANS:
Quaternary period
PTS:1DIF:Level AREF:act0976aaf18007e16b_507
STA:FL.NGSSS.SCI.08.9-12.SC.912.N.1.1.6TOP:Ch 12 Test - A
NOT:978-0-618-78317-5
13.ANS:
The largest mass extinction event divided the Paleozoic and the Mesozoic eras.
PTS:1DIF:Level AREF:act0976aaf18007e16b_510
STA:FL.NGSSS.SCI.08.9-12.SC.912.N.1.1.6 | FL.NGSSS.SCI.08.9-12.SC.912.L.15.3 | FL.NGSSS.SCI.08.9-12.SC.912.L.17.8 TOP: Ch 12 Test - A
NOT:978-0-618-78317-5
14.ANS:
the Cenozoic era
PTS:1DIF:Level AREF:act0976aaf18007e16b_513
STA:FL.NGSSS.SCI.08.9-12.SC.912.N.1.1.6TOP:Ch 12 Test - A
NOT:978-0-618-78317-5
15.ANS:
Cambrian period, Ordovician period, Silurian period, Devonian period, Carboniferous period, Permian period
PTS:1DIF:Level AREF:act0976aaf18007e16b_516
STA:FL.NGSSS.SCI.08.9-12.SC.912.N.1.1.6TOP:Ch 12 Test - A
NOT:978-0-618-78317-5
16.ANS:
Homo neanderthalensis and Homo sapiens; or, Australopithecus afarensis and Homo habilis.
PTS:1DIF:Level AREF:act0976aaf18007e16b_525
STA:FL.NGSSS.SCI.08.9-12.SC.912.N.1.1.6 | FL.NGSSS.SCI.08.9-12.SC.912.L.15.10
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
17.ANS:
Homo sapiens
PTS:1DIF:Level AREF:act0976aaf18007e16b_547
STA:FL.NGSSS.SCI.08.9-12.SC.912.N.1.1.6 | FL.NGSSS.SCI.08.9-12.SC.912.L.15.10
TOP:Ch 12 Test - ANOT:978-0-618-78317-5
18.ANS:DPTS:1
19.ANS:CPTS:1
20.ANS:BPTS:1