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Changing Earth Review Flashcards | StudBud
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Changing Earth Review
Changing Earth Review
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Walker Changing Earth Review Game
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
Many different types of organisms evolved in The Great Explosion, during the Paleozoic Era.
False
True
2
Which type of fossil can provide clues about the activities of ancient organisms?
trace fossils
molds and casts
carbon films
remains preserved in amber
3
A type of organism that no longer exists on Earth is said to be
fossilized.
sedimentary.
extinct.
petrified.
4
We are taking a break right now
False
True
5
The law of superposition helps geologists determine the absolute age of a rock layer.
True
False
6
Rock layers are always younger than the faults that cut across them
True
False
7
Radioactive decay occurs when atoms of an unstable element
become part of a fossil.
join with atoms of another element.
are exposed to chemical weathering.
break down to form atoms of another element.
8
The geologic time scale is a record of
the rate of fossil formation.
the life forms and geologic events in Earth’s history.
the thickness of sedimentary rock layers.
the time since the evolution of dinosaurs.
9
The Mesozoic Era is divided into the Triassic, Jurassic and Cretaceous periods.
True
False
10
Paleontologists have found that older rocks contain fossils of
both simple and complex organisms.
organisms that are more complex than those alive today.
only organisms that are alive today.
organisms that are simpler than those alive today.
11
Radioactive dating works best with what type of rocks?
metamorphic rocks
fossilized rocks
igneous rocks
sedimentary rocks
12
Radioactive dating enables geologists to determine
the absolute ages of rocks.
the relative ages of rocks.
the age of the atoms in a rock.
the half-life of a fossil organism.
13
What is the age of an intrusion in relation to the sedimentary rock layers it cuts through?
the same age as the other rock layers
always younger
always older
sometimes younger, sometimes older
14
Scientists hypothesize that Earth formed roughly ____________________ years ago.
4 million
5.8 billion
10 million
4.6 billion
15
Life on Earth first appeared during the Cambrian Period.
False
True
16
During the Quaternary Period, a series of ___________ occurred when Earth’s climate cooled.
ice ages
meteorides
volcanic eruptions
mass extinction
17
The extinction of dinosaurs gave warm-blooded vertebrates,or _____ a chance to become abundant.
amphibians
reptiles
mammals
trilobites
18
The Cenozoic era is often called the Age of
Reptiles
Fishes.
Mammals
Amphibians.
19
What is a fossil?
any dead organism
an unusual type of rock
a perfect copy of a rock
the preserved remains or traces of an organism
20
Fossils of organisms that were widely distributed but only lived during a short period of time
carbon film fossils.
petrified fossils
index fossils.
trace fossils.
21
Why are index fossils useful to geologists?
They tell the ages of many different rock layers.
They tell the age of the rock at one location only.
They tell the absolute age of the rock in which they occur.
They tell the relative age of the rock in which they occur.
22
Generally, only the soft parts of organisms become fossils.
True
False
23
The present day is part of the ____________________ Era.
Mesozoic
Cenozoic
Paleozoic
Precambrian
24
Footprints and trails are examples of trace fossils
False
True
25
Geologic time begins with the long span of time called ____________________ Time.
Mesezoic
Precambrian
Cenezoic
Paleozoic
