1What are the 4 eras?
Precambrian, Paleozoic, Mesozoic, Cenozoic
2How long is the Precambrian era?
Approximately 4.059 billion years
3When did the Precambrian era begin?
4.5 BYA
4When did the Precambrian era ended?
540 MYA
5commonly called "The Age of Early Life"
Precambrian Era
6Known to be the oldest era of Earth's History
Precambrian Era
7What are the 3 Eons of the Precambrian era?
Hadean, Archean, and Proterozoic
8Known to be the longest era of Earth's History
Precambrian Era
9oceans of liquid rock, boiling sulfur, and impact craters everywhere
Hadean eon
104,500 - 4,000 bya
Hadean eon
11what is the longest eon?
Hadean eon
12Also known as "Ancient" or "Primitive"
Archean eon
13Eon where mostly everything has cooled down. Most of the water vapor that was in the air has condensed to form a global ocean.
Archean eon
14also means the "Earlier Life"
Proterozoic eon
15There is a lot more land to be seen. In fact, there are two supercontinents.
Proterozoic eon
16covered with meteors and other cosmic debris
Hadean eon
17eon where it is very hot that it's completely uninhabitable
Hadean eon
18what is the climate like during the Hadean eon?
Very hot that it's completely uninhabitable
19eon where it is cold and no presence of oxygen
Archean eon
20What is the climate like during the Archean eon?
cold and no presence of oxygen
21eon where it is still cold but can now accumulates oxygen
Proterozoic eon
22What is the climate like during the Proterozoic eon?
Still cold but can now accumulates oxygen
23What best describes the Precambrian era?
-commonly called "The Age of Early Life"
-Known to be the longest and oldest era of Earth's History
-Divided into Three (3) Eons: Hadean, Archean, and Proterozoic
24Prokaryotes were predominant until when?
1.7 - 1.9 BYA
25They were the predominant organisms in the early Precambrian era
Prokaryotes
26Became the predominant organisms that profusely developed in the early Proterozoic eon
Eukaryotes
27a common Precambrian Fossil
Stromatolites (algae-like microorganisms)
28Soft-bodied worm-like creatures lived in the Earth's ocean however, Land remained barren/deserted.
Precambrian Era
29How did the Precambrian era ended?
Precambrian Mass extinction occurred (abrupt disappearance of species) Due to Climatic and geologic events
30How long is the Paleozoic era?
It Lasted 289 Million Years
31When did the Paleozoic era begin?
541 or 542 MYA
32When did the Paleozoic era ended?
252 MYA
33What Best Describes the Paleozoic era?
-takes its name from the Greek word Paleo meaning Old
-Paleozoic means ancient life.
-Consists of 6 periods:
Cambrian period
Ordovician period
The Silurian period
The Devonian period
Carboniferous period
Permian period
34takes its name from the Greek word Paleo meaning Old
Paleozoic era
35it means ancient life
Paleozoic era
36What are the 6 periods in the Paleozoic era?
Cambrian, Ordovician, The Silurian, The Devonian, Carboniferous, and Permian
37time where animals is one of life in the sea and barren of the simplest of life-forms
Early Paleozoic era
38Several different kinds of organisms adapted independently to life on land
Middle Paleozoic era
39Huge, swampy forest regions covered much and Plant and animal life flourished
Late Paleozoic era
40What is the climate like during the Paleozoic era?
average global temperatures were exceedingly high
Warm and wet climate
41average global temperatures were exceedingly high. It is a warm and wet climate
Paleozoic era
42period where there were no land plants or animals, but there were marine organisms
Cambrian period
43Considered as the age of trilobites
Cambrian period
44period where Life was dominated by marine invertebrates
Ordovician period
45period that marks the first appearance of land plants and jawed fishes
The Silurian period
46period where primitive marines and freshwater fishes appeared and proliferated
The Devonian period
47Considered as the "Age of Fishes."
The Devonian period
48Period where swamp forests, vertebrates, and amphibians became widespread reptiles appeared
Carboniferous period
49Period where everything evolved, Then the largest mass extinction in Earth's history took place.
Permian period
50How did the Paleozoic Era end?
It ended with the largest mass extinction event in the history of Earth, The Permian-Triassic extinction event
51It ended with the largest mass extinction event in the history of Earth, The Permian-Triassic extinction event
Paleozoic era
52How long was the Mesozoic era?
186 million years
53When did the Mesozoic era begin?
252 MYA
54When did the Mesozoic era end?
66 MYA
55Known as "The Age of Reptiles/Dinosaurs" and "Age of Conifers"
Mesozoic era
56What are the three periods of Mesozoic era?
Triassic, Jurassic, Cretaceous
57What was the climate like during Mesozoic era?
-generally warm and there was less difference in temperature from this era and the present.
-Warmer, mild, no polar ice
58The length of the Precambrian era is what percentage of the Earth's History?
90%
59During which eon does the Mesozoic era occur?
the Phanerozoic eon
60Life Began on Earth because chemicals in the ocean reacted with radiation from the sun. True or False
True
61Life Began on Earth because glaciers in the ocean reacted with radiation from the sun. True or False
False
62In the Mesozoic era, No evidence of glaciation during
Triassic and Jurassic period
63What are the Predominant organisms during the Mesozoic era?
Life diversified rapidly and giant reptiles, dinosaurs, and other monstrous beasts roamed the Earth
64In this Era, Life diversified rapidly and giant reptiles, dinosaurs, and other monstrous beasts roamed the Earth
Mesozoic era
65How did the Mesozoic era ended?
due to another mass extinction called Cretaceous-Paleogene extinction event
66How long is the Cenozoic era?
66 MYA and extending to the present.
67best described as the "Age of Mammals"
Cenozoic era
68In this era, due to extinction of giant mammals, it allowed smaller species to thrive and diversify because their predators no longer existed.
Cenozoic era
69What are the Three periods of Cenozoic era and its epochs?
Paleogene Period
-Paleocene epoch
-Eocene epoch
-Oligocene epoch
Neogene period
-Miocene epoch
-Pliocene epoch
Quaternary period
-Pleistocene epoch
-Holocene Epoch
70What are the Epochs of Paleogene Period?
Paleocene, Eocene, Oligocene
71What are the epochs of Neogene period?
Miocene, Pliocene
72What are the Epochs of the Quaternary Period?
Pleistocene, Holocene
73In this era, Mammals took advantage of the extinction of the dinosaurs.
Cenozoic era
74They flourished and soon became dominant animals on Earth
Mammals
75What are the predominant organisms in the Cenozoic era?
Mammals took advantage of the extinction of the dinosaurs.
76How did the Cenozoic era ended?
We are currently in the Cenozoic Era and this era has not ended yet.