Shared Flashcard Set

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Eras and Periods
Earth Science
45
Science
9th Grade
01/30/2015

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Cards

Term
Precambrian
Definition
"earth, atmosphere, ocean, continents form
Term
Theory of Earth Formation
Definition
"rocks an dust etc. put together by gravity"
Term
Precambrian Atmosphere
Definition
"Made up of carbon dioxide and nitrogen, later organisms exchanged carbon to oxi"
Term
Precambrian Ocean
Definition
"Rains evaporated but then returned to the ground, the waters filled low areas"
Term
Shields
Definition
"Precambrian rock, oldest deformed metamorphic"
Term
Precambrian Life
Definition
"evolved in the ocean, later they became more complex using photosynthesis"
"First living organisms lived in vents"
Term
Cyanobacteria
Definition
made food with the sun
Term
Stromatolites-
Definition
layered mounds of calcium carbonate
Term
Prokaryote
Definition
early organism "evolved" more complex
Term
Eukaryotes
Definition
more complex than Prokaryote, had a nuclei
Term
Cambrian Explosion
Definition
lots of group of organisms "evolved" in a short time
Term
Cambrian Earth
Definition
Breakup of Rodina formed lots of environments, earth warmed up
Term
Cambrian Life
Definition
Life increased in "15 million years", first animals with hard parts
Term
Ordovician Period
Definition
Complex communities of organisms developed
Term
Ordovician Earth
Definition
Movement of gondwana build eastern north America
Term
Ordovician Life
Definition
reef, brachiopods, jaw-less fish with bony external, liverworts in land
Term
Silurian Period
Definition
reef building, fish "evolved", plants and animals wide spread.
Term
Silurian Earth
Definition
Gondwana is centered in the south pole
Term
Silurian Life
Definition
fish had better armor, fish with jaw, first vascular plants
Term
Devonian Period
Definition
jawed fishes and sharks, plants, insects, and amphibians
Term
Devonian Earth
Definition
Lauraisa in the north, north America and Europe collided "forming the Appalachian mountains"
Term
Devonian Life
Definition
fish with bony skeletons, ferns, amphibians
Term
Carboniferous Period
Definition
wet tropical regions, amphibians and wing animals
Term
Carboniferous Earth
Definition
"North America and Africa collide, formed Appalachian mountains, sea levels rose and fell"
Term
Carboniferous Life
Definition
reptiles, forest sawmps
Term
Permian Period
Definition
"Pangaea starts, great mass extinction"
Term
Permian Life
Definition
conifers, insects, Dimetrodon with a sail on the back
Term
Permian Extinction
Definition
"250 million years, 98% of animals killed,"
Term
Mesozoic Era
Definition
Age of reptiles
Term
Triassic Period
Definition
"lots of reptiles, mammals later"
Term
Triassic Earth
Definition
"Pangaea, hot summers cold winters,
Term
Triassic Life
Definition
Reptiles,mammals,plants
Term
Gymnosperms
Definition
Plant with seed and no protective coat
Term
Jurassic Period
Definition
"Pangaea continues to split, many dinosaurs"
Term
Jurassic Earth
Definition
Seas formed in rifts
Term
Jurassic Life
Definition
Jaw structure, scales, skeletons on fish reptiles in ocean
Term
Archaeopteryx
Definition
small and feathered, glided had reptile teeth
Term
Cretaceous Earth
Definition
Plates moved, climate got warmer, shallow seas and sawmps
Term
Cretaceous Life
Definition
large and small dinos, angioapwema produced plants with seeds and outer covering
Term
Cretaceous Extinction
Definition
Volcano or meteorite
Term
Cenozoic Era
Definition
The age of mammals
Term
Tertiary Period
Definition
Mountain building, climate change, Pangaea breakup
Term
Tertiary Earth
Definition
North American Rockies, Europe Alps, and Himalayas
Term
Tertiary Life
Definition
Song birds, snakes, limbs and teeth
Term
Quaternary Period
Definition
Huge mammals extinct, Milankovitch cycles
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