Glencoe Earth Science

Chapter 14: Geologic Time

Geologic Time

1
What does the name trilobite mean?
A)three lobes
B)three brains
C)three legs
D)three eyes
2
What is organic evolution?
A)evolution resulting from chemicals
B)the way organisms remain the same over time
C)the change of organisms over time
D)evolution of nonliving things
3
When did Pangaea break up?
A)in the Mesozoic Era
B)in Precambrian time
C)in the Cenozoic Era
D)in Archean time
4
Which of the following is an example of how a new species can develop in nature?
A)A dog breeder makes a new breed of dog that looks different from all the others.
B)A scientist in a laboratory develops a new species.
C)Two different species develop in such a way that they look the same.
D)A group becomes separated and they evolve until they cannot interbreed with the original population.
5
Which of the following is a species common during the Paleozoic Era?
A)trilobites
B)dinosaurs
C)Ediacara life-forms
D)Homo sapiens
6
Order the divisions of geologic time from the longest to the shortest.
A)eons, eras, periods, epochs
B)periods, epochs, eras, eons
C)eons, epochs, eras, periods
D)epochs, periods, eras, eons
7
Where did the oxygen in Earth's atmosphere come from originally?
A)from plants
B)from rocks
C)from cyanobacteria
D)from animals
8
Which of the following is NOT a description of the current view of dinosaurs?
A)nurturing their young
B)cold-blooded
C)warm-blooded
D)fast-moving
9
How did trilobite eyes develop?
A)They all had complex eye structures.
B)They developed into many different forms over millions of years.
C)They developed the same way for all species.
D)They all developed without eyes.
10
How can plate tectonics contribute to evolution?
A)Radiation from plate tectonics can cause genetic change.
B)Separating plates can divide groups of a population
C)Volcanic eruptions can cause species to become extinct.
D)The movement of plates forces some animals underground.
11
The Appalachian Mountains, an old mountain range, was formed during what era?
A)Cenozoic
B)Mesozoic
C)Precambrian
D)Paleozoic
12
Why is the Precambrian fossil record so sparse?
A)There were no living things.
B)All organisms lived on land.
C)Many of the organisms had soft bodies.
D)Vertebrates developed then.
13
A German shepherd and a Chihuahua look different, but they can interbreed. They are __________.
A)proof for evolution
B)from different species
C)products of natural selection
D)from the same species
14
What are Ediacara life-forms?
A)direct ancestors of Cambrian life-forms
B)alien life-forms
C)unique organisms that went extinct
D)no one knows for sure
15
What geologic era do you live in?
A)Precambrian
B)Mesozoic
C)Paleozoic
D)Cenozoic
16
What occurs at the end of a geologic era?
A)a mountain-building event
B)an extinction
C)a comet hitting Earth
D)a flood
17
What types of animals dominate the Cenozoic Era?
A)trilobites
B)mammals
C)reptiles
D)dinosaurs
18
What is an example of an index fossil?
A)trilobites
B)jellyfish
C)Tyrannosaurus rex
D)humans
19
The longest section of Earth's history was __________.
A)Cretaceous period
B)Cenozoic Era
C)Precambrian time
D)Paleozoic Era
20
Two organisms look alike but they do not interbreed naturally. They are __________.
A)from the same species
B)from different species
C)both mammals
D)extinct
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