history of life

Question 1

A record of life forms and geological events in Earth’s History

Answer 1

geological timescale

Question 2

a division of geologic history with spans of no more than 100 million years

Answer 2

Period

Question 3

Division that span time periods of tens to hundred of million of year

Answer 3

Era

Question 4

Smallest division of the geological time scale

Answer 4

Epoch

Question 5

Largest division of the geological time scale; half billion - 2 billion of years

Answer 5

Eon

Question 6

_____ remnant, impression, or trace of an animal or plant past a geological age that has been preserved in the Earth’s crust

Answer 6

Fossils

Question 7

The complex of data recorded in fossils worldwide is known as ______ which is the primary source of information about the history of life on Earth.

Answer 7

fossil record

Question 8

Age of a fossil is determined through _____ and ______

Answer 8

relative dating
absolute dating

Question 9

lasted for 4.5 million years; about 88 % of the Earth’s History

Answer 9

Precambrian Eon

Question 10

The solidification of the earth’s continental and oceanic crust

Answer 10

Hadean Eon (4.6 Billion Years ago)

Question 11

The evolution of earth’s first life forms

Answer 11

Archean Eon (4 Billion Years ago)

Question 12

Precambrian Eon

Answer 12

Hadean Eon (4.6 Billion Years ago)
Archean Eon (4 Billion Years ago)
Proterozoic Eon (2.5 Billion Years ago)

Question 13

Phanerozoic Eon

Answer 13

Paleozoic Era (544M Years Ago)
Mesozoic Era (245M Years Ago)
Cenozoic Era (65M Years ago - Now)

Question 14

The era that began with a spectacular burst of life.
Organisms that exists here are the ff:
Echinoderms
Arthropods

Answer 14

cambrian period
(544 - 505 Million years ago)

Question 15

Trilobites

Answer 15

Arthropods

Question 16

prehistoric sponges

Answer 16

Echinoderms

Question 17

• The ocean were filled with many invertebrates
• The first fish evolved
Plants colonized the land for the first time, but animals still remained in water

Answer 17

ordovician period
(505 - 440 Million years ago)

Question 18

• In the ocean, corals appeared and fish continued to evolve
• On land, vascular plants appeared. With special tissues to circulate water and other materials.

Answer 18

Silurian period
(440 - 410 Million years ago)

Question 19

• The first seed plant evolved. Seeds have protective coat and food to help them survive.
• Fish with lobe fins evolved. They can breath air when they raised their heads above water.

Answer 19

devonian period
(410 - 360 Million years ago)

Question 20

• Wide spreading of forest left deposits of carbon that turned into coal
• The first amphibians & reptiles colonized land.

Answer 20

CARBONIFEROUS period
(360 - 290 Million years ago)

Question 21

• All major land masses collided to form Pangea
• Temperature were extreme and climate was dry
• Plants evolved with waxy leaves, while animals evolved with leathery skin to avoid water loss.

Answer 21

PERMIAN period
(290 - 245 Million years ago)

Question 22

Mesozoic Era (245 Million Years Ago)

Answer 22

Cretaceous Period (145.0 MYA)
Jurassic Period (201.3 MYA)
Triassic Period (251.9 MYA)

Question 23

• Age of Reptiles
• “ Era of Dinosaurs”

Answer 23

MESOZOIC ERA
(280 Million years ago)

Question 24

• First Dinosaur colonized the land, air, and water
• Huge seeds, ferns and conifers dominated the forests, and modern corals, fish, and insects.
• The Pangea started to separate into Laurasia & Gondwanaland
• Ended with another mass extinction.

Answer 24

TRIASSIC PERIOD
(251 Million years ago)

Question 25

• “Golden Age of Dinosaurs” • Earliest bird and mammal evolved • First flowering plants and new insects (pollinator) • Continents continued to move (Volcanic Activity)

Answer 25

JURASSIC PERIOD (203.1 Million years ago)

Question 26

• Dinosaurs’ peak in size and distribution • Earth’s climate was warm; the poles lacked ice • Continents were close to their present locations • Ended with extinction of the dinosaurs

Answer 26

CRETACEOUS PERIOD (145 Million years ago)

Question 27

Cenozoic Era (65 Million Years ago

Answer 27

Paleocene Period (66.0 MYA) Eocene Period (56.0 MYA) Oligocene Period (33.9 MYA) Miocene Period (23.0 MYA) Pliocene Period (5.3 MYA) Pleistocene Period (2.6 MYA) Holocene

Question 28

Age of Mammals “ Recent Life”

Answer 28

Cenozoic Era (65 Million Years ago

Question 29

• Climate was generally warm and humid • Mammals evolved (Increase in size) • Primates evolved (human ancestors) • Modern rainforest and grassland appeared • Flowering plants and insects are numerous

Answer 29

tertiary PERIOD (65 - 1.8 Million years ago)

Question 30

• First rodents, rabbits, primates and carnivores. • Small mammal became larger by late Paleocene epoch

Answer 30

Paleocene epoch (65.5 – 55.8 Million years ago)

Question 31

• Hyracotherium, echinoids abundant • Whale-like mammal, hyena-like mammal

Answer 31

eocene epoch (56 Million years ago)

Question 32

• Hominoids (Early Apes) • Mesohippus, basic orders of mammals present

Answer 32

oligocene epoch (33.9 Million years ago)

Question 33

• Major Climatic Changes • Pigs, Camels, Cattles, Deer, Giraffe, Merychippus

Answer 33

MIocene epoch (23 Million years ago)

Question 34

• Pliohippus, H. Habilis (2.5MYA), H. Erectus (1.8 MY) • Hominids (earliest humans 4.4 MYA), Australopithecus

Answer 34

PLIOcene epoch (5.3 Million years ago)

Question 35

• Climate cooled leading to a series of ice age • Sea levels fell because water froze into glaciers • Created land bridges between continents, allowing land animals to move to new areas

Answer 35

quaternary PERIOD (1.8 Million years ago - present)

Question 36

Equus (Horse), Cro-Magnon Ice-age begins, Neandertals Pleistocene Extinction caused by over predation and lack of vegetation

Answer 36

Pleistocene epoch (2.6 Million years ago)

Question 37

• Sumerian Civilizations (0.006 MYA) Ice Age ends • Agriculture and Development

Answer 37

holocene epoch (0.01 Million years ago)