BIO 2 HISTORY OF EARTH

Question 1

The longest time unit in the GTS

Answer 1

Eons

Question 2

The term was coined in 1972 by geologist Preston Cloud.

Answer 2

Hadean eon

Question 3

The period was later classified as the Priscoan period by W. Brian Harland.

Answer 3

Hadean Eon

Question 4

The time period of this Eon is 4.6 to 4 Billion years ago

Answer 4

Hadean Eon

Question 5

The atmosphere of this eon is Hot, thick, steamy, and full of dust and crud. Made up of mostly carbon dioxide and water vapor, with traces of nitrogen and smelly sulfur compounds.

Answer 5

Hadean Eon

Question 6

The Geology of this Eon is Covered with oceans of liquid rock, boiling sulfur, and impact craters.

Answer 6

Hadean Eon

Question 7

The Life forms of this eon are Small amounts of organic carbon has been found that probably may be an evidence of first life on earth.

Answer 7

Hadean Eon

Question 8

Reason why this eon ended because of the cooling of the earth’s temperature.

Answer 8

Hadean Eon

Question 9

It was first used in 1872, Which means “the earliest geological age”

Answer 9

Archean Eon

Question 10

The time period of this eon is between 4 to 2.5 BYA

Answer 10

Archean Eon

Question 11

The atmosphere of this eon is Comprised methane ammonia, and other gases.

Answer 11

Archean Eon

Question 12

The atmosphere of this eon is Most of the carbon dioxide have been chemically changed into limestone and deposited at the bottom of the ocean.

Answer 12

Archean Eon

Question 13

The geology of this eon are Formation of the continental shield rock, Small “island” land masses floated in the molten “seas.” And Start of the formation of oceans

Answer 13

Archean Eon

Question 14

The geology of this eon are Water from comets and hydrated minerals condensed in the atmosphere and fell as torrential rain, cooling the planet and filling the first oceans with liquid water.

Answer 14

Archean Eon

Question 15

The life forms of this eon are Microscopic prokaryotes such as photosynthetic bacteria, (Cyanobacteria) Stromatolites, Single-celled archaea extremophiles

Answer 15

Archean Eon

Question 16

What eon did Life began in the oceans about 3.5 billion to 2.8 billion years ago. (

Answer 16

Archean Eon

Question 17

The oldest fossils ever found in Archean eon (3.5 bya). Are layered bio-chemical accretionary structures that formed in shallow water by the trapping, binding, and cementation of sedimentary grains of microorganisms.

Answer 17

Stromatolites

Question 18

The time period of this eon is 2.5 GA to 541 MA

Answer 18

Proterozoic Eon

Question 19

The atmosphere of this eon is Mostly nitrogen, with a little water vapor and carbon dioxide. With Free oxygen released by cyanobacteria

Answer 19

Proterozoic Eon

Question 20

The geology of this eon is Formation of supercontinents: Rodinia and Frequent movement of earth surface ( Plate Tectonics) and continental collisions.

Answer 20

Proterozoic Eon

Question 21

The life forms of this eon are 1.7 GA - Appearance of single celled eukaryotes.
511 MA - appearance of multicellular organism. And still only found in the ocean

Answer 21

Proterozoic Eon

Question 22

During Proterozoic Eon the GREAT OXYGENATION EVENT happens which cause the

Answer 22

Extinction of many anaerobic bacteria

Question 23

It belongs to the Proterozoic Eon and its Approximately 635 million to 541 million years ago
Autotrophs and soft-bodied heterotrophs

Answer 23

The Ediacaran Period

Question 24

The first fossil presented in the ppt in The Ediacaran period

Answer 24

Ediacaran biota - Charnia

Question 25

The second fossil presented in the ppt in The Ediacaran period

Answer 25

Ediacaran biota- Dickinsonia

Question 26

Caused by a 250 million year lull in volcanic activity. This caused a decrease in the carbon dioxide of the atmosphere resulting in a climate cool down

Answer 26

Snowball earth

Question 27

The term “phanerozoic” was first introduced by the American geologist George Halcott Chadwick (1876–1953).

Answer 27

Phanerozoic Eon

Question 28

Because it was once believed that the life began in Cambrian, the first period of the

Answer 28

Phanerozoic Eon

Question 29

The time period of this eon is 541 MA to present

Answer 29

Phanerozoic Eon

Question 30

The Phanerozoic eon is the eon of abundant complex life. It is the eon we are living in.

Answer 30

Phanerozoic Eon

Question 31

In the Phanerozoic Eon it is divided into 3 era

Answer 31

Paleozoic Era Mesozoic Era Cenozoic Era

Question 32

The term 'Paleozoic' has been derived from Greek words: palaios meaning 'ancient' and zoe meaning 'life' Marks the beginning of life on our planet. It was the period of early life where plants, corals, mollusks, insects, fish, and many other living organisms emerged.

Answer 32

Paleozoic Era

Question 33

The time period of this era is 542 – 252 MA

Answer 33

Paleozoic Era

Question 34

The atmosphere of this era is Nitrogen, oxygen, carbon Dioxide and other trace gases

Answer 34

Paleozoic Era

Question 35

The geology of this era is Formation of continents Formation of mountain chains, formation of coal beds. Earth's surface experienced a lot of activity, including shifting of tectonic plates,

Answer 35

Paleozoic Era

Question 36

The climate of this era is There are extreme shifts in climate in each era

Answer 36

Paleozoic Era

Question 37

The life forms of this era are Invertebrates (animals without backbones) such as corals, brachiopods, mollusks, and arthropods such as trilobites ruled the oceans in the early and middle parts of the Paleozoic. However Vertebrates (including fish, amphibians, and reptiles) began to flourish in the later Paleozoic.

Answer 37

Paleozoic Era

Question 38

60% of invertebrates in the oceans and seas became extinct. May be triggered by volcanic eruptions (Paleozoic era)

Answer 38

Late Ordovician Mass Extinction

Question 39

Permian-Triassic Mass Extinction most severe extinction in our planet's history (Paleozoic era)

Answer 39

THE GREAT DYING EVENT

Question 40

This eon is 253 to 66 million years ago

Answer 40

Mesozoic Eon

Question 41

The geology of this eon is Separation of the supercontinent Pangaea

Answer 41

Mesozoic Eon

Question 42

The climate is warm throughout the triassic and jurassic period but towards the middle of the cretaceous period the climate became warmer. Then global cooling occurred at the end of the Mesozoic

Answer 42

Mesozoic Eon

Question 43

The life forms of this eon is Appearance of dinosaurs, birds, plants, and mammals

Answer 43

Mesozoic Eon

Question 44

At the end of the Mesozoic, the Cretaceous-Tertiary Mass Extinction occurred. This was the extinction event that killed the dinosaurs (among others). (Notable event of Mesozoic era)

Answer 44

The K-Pg Event

Question 45

The time period is 67 million years ago to present

Answer 45

Cenozoic era