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Geological Time
Geological Time
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The Precambrian, geological time, prokaryotes & eukaryotes, autotrophs & heterotrophs.
Flashcards
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Questions
32
Answers
1
The Eon that lasted from 4.6 billion to 4 billion years ago is known as:
Archean
Cambrian
Jurrasic
Hadean
2
True or False: Mantle plumes create and thicken the Earth's crust.
False
True
3
A period of time in which many species die is known as a:
mass extinction
mass beginning
great ending
great culling
4
Precambrian time ended with a mass extinction.
False
True
5
During which Eon was the Earth's surface covered in volcanoes?
Hadean
Proterozoic
Archean
Jurrasic
6
"Mya" means "millions of years ago."
True
False
7
All scientists agree that Rodinia was the first supercontinent.
False
True
8
True or False: Humans are prokaryotes.
True
False
9
About 650 million years ago, the Earth was the coldest it has ever been. This event is known as:
cold time
the great freeze
iceball Earth
snowball Earth
10
Which type of organism produces its own energy through photosynthesis?
heterotrophs
autotrophs
animals
11
There is a supercontinent cycle in which continents come together and then more apart.
True
False
12
Continents formed and life began during the:
Cambrian Eon.
Jurrasic Eon.
Proterozoic Eon.
Archean Eon.
13
What percent of the Earth's history is within the Precambrian supereon?
18%
100%
50%
88%
14
What is the smallest division of geological time?
era
supereon
eon
period
15
Which gas was common in the Earth's early atmosphere, but is uncommon today?
ammonia
nitrogen
oxygen
16
Which hypothesis about Moon formation is best supported by evidence?
Moon formed from debris from a planetary impact.
The Moon is from another solar system.
Earth & Moon formed at the same time.
The Moon as a captured asteroid.
17
Cyanobacteria played an important role in adding ________ to the Earth's atmosphere.
oxygen
carbon dioxide
nitrogen
water vapor
18
What is a stromatolite?
a multicellular organism
an animal
a colony of cyanobacteria
an extinct organism
19
True or False: Single celled organisms existed before multicellular organisms.
False
True
20
Early organisms that increased the amount of oxygen in the Earth's atmosphere are known as:
archeans
fungi
cyanobacteria
viruses
21
4.5 BYA is equal to how many MYA?
0.0045 Mya
45 Mya
4500 Mya
4500,000 Mya
22
The Precambrian consists of the Hadean Eon, Archean Eon and the ___________ Eon.
Jurrasic
Cambridgean
Cryogenic
Proterozoic
23
Saying "dinosaurs appeared before humans" is an example of using:
relative time.
absolute time.
24
Humans are autotrophs.
True
False
25
Which part of the cell do eukaryotes have that prokaryotes do not have?
cell walls
a cell nucleus
cytoplasm
DNA
26
All scientists agree that the Earth was
completely
frozen sometime during the Precambrian.
False
True
27
Water first filled the Earth's oceans through:
planetary impacts
volcanic eruptions and comets
earthquakes and ice sheets
the solar wind
28
Which of the following organisms is a heterotroph?
human
cyanobacteria
fern
tree
29
"Billions of years ago" is abbreviated as:
Bya
Kya
Mya
Billyago
30
Which type of geological time includes an exact or estimated date?
relative
absolute
31
The most recent supercontinent is known as:
North America
Rodinia
Pangea
Columbia
32
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