North Carolina Science Grade 8

Chapter 4: Geologic Time

Geologic Time

1.
Which of the following is an example of how a new species can develop in nature?
A)A group becomes separated and they evolve until they cannot interbreed with the original population.
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 dog breeder makes a new breed of dog that looks different from all the others.
2.
Which of the following is NOT a description of the current view of dinosaurs?
A)fast-moving
B)warm-blooded
C)cold-blooded
D)nurturing their young
3.
Why is the Precambrian fossil record so sparse?
A)All organisms lived on land.
B)Many of the organisms had soft bodies.
C)There were no living things.
D)Vertebrates developed then.
4.
A German shepherd and a Chihuahua look different, but they can interbreed. They are __________.
A)from the same species
B)products of natural selection
C)from different species
D)proof for evolution
5.
What is organic evolution?
A)evolution resulting from chemicals
B)the change of organisms over time
C)the way organisms remain the same over time
D)evolution of nonliving things
6.
When did Pangaea break up?
A)in Archean time
B)in the Cenozoic Era
C)in Precambrian time
D)in the Mesozoic Era
7.
What geologic era do you live in?
A)Cenozoic
B)Precambrian
C)Mesozoic
D)Paleozoic
8.
Two organisms look alike but they do not interbreed naturally. They are __________.
A)from different species
B)extinct
C)from the same species
D)both mammals
9.
What occurs at the end of a geologic era?
A)a comet hitting Earth
B)a flood
C)an extinction
D)a mountain-building event
10.
Where did the oxygen in Earth's atmosphere come from originally?
A)from plants
B)from rocks
C)from animals
D)from cyanobacteria
11.
What does the name trilobite mean?
A)three lobes
B)three legs
C)three eyes
D)three brains
12.
What are Ediacara life-forms?
A)alien life-forms
B)direct ancestors of Cambrian life-forms
C)no one knows for sure
D)unique organisms that went extinct
13.
The Appalachian Mountains, an old mountain range, was formed during what era?
A)Cenozoic
B)Paleozoic
C)Mesozoic
D)Precambrian
14.
__________ are ancestors of reptiles.
A)Dinosaurs
B)Birds
C)Mammals
D)Amphibians
15.
The longest section of Earth's history was __________.
A)Paleozoic Era
B)Cenozoic Era
C)Cretaceous period
D)Precambrian time
16.
What is an example of an index fossil?
A)trilobites
B)jellyfish
C)Tyrannosaurus rex
D)humans
17.
What was Pangaea?
A)a large, single landmass
B)the original name for North America
C)a geologic era
D)a type of trilobite
18.
How can plate tectonics contribute to evolution?
A)Volcanic eruptions can cause species to become extinct.
B)The movement of plates forces some animals underground.
C)Radiation from plate tectonics can cause genetic change.
D)Separating plates can divide groups of a population
19.
During the first billion years of Earth's history, ___________.
A)vertebrates evolved
B)there was no life
C)trilobites evolved
D)there was life everywhere
20.
What types of animals dominate the Cenozoic Era?
A)dinosaurs
B)trilobites
C)mammals
D)reptiles
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