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8 Sci Geologic Time

8th Grade Science Geologic Time Vocabulary

QuestionAnswer
GEOLOGIC TIME SCALE THE DIVISION OF EARTH'S HISTORY INTO SMALLER UNITS BASED ON MAJOR EVOLUTIONARY CHANGES AND GEOLOGIC EVENTS.
EON THE LARGEST DIVISION OF GEOLOGIC TIME
ERA A UNIT OF GEOLOGIC TIME THAT INCLUDES TWO OR MORE PERIODS, BASED ON THE TYPES OF LIFE THAT EXISTED.
PERIOD A UNIT OF GEOLOGIC TIME INTO WHICH ERAS ARE DIVIDED.
EPOCH A SMALLER GEOLOGIC TIME THAN A PERIOD.
EXTINCTION THE DEATH OF EVERY MEMBER OF A SPECIES.
PRECAMBRIAN TIME LONGEST GEOLOGIC TIME UNIT IN EARTH'S HISTORY WITH A SPARSE FOSSIL RECORD.
CYANOBACTERIA ONE OF THE EARLIEST, PHOTOSYNTHETIC LIFE-FORMS ON EARTH.
PALEOZOIC ERA MEANS "ANCIENT LIFE". GEOLOGIC ERA MARKED BY THE FIRST APPEARANCE OF ORGANISM WITH HARD PARTS AND A LARGE FOSSIL RECORD. ENDED WITH LARGEST MASS EXTINCTION IN EARTH'S HISTORY, 90% OF ALL SPECIES.
AMPHIBIAN ANIMAL THAT LIVES ON LAND, BREATHES AIR, BUT NEEDS WATER TO REPRODUCE.
REPTILE EGG-LAYING, SCALY SKINNED ANIMAL THAT DOES NOT WATER TO REPRODUCE.
PANGAEA SINGLE, LARGE LANDMASS MADE UP OFF ALL THE CONTINENTS JOINED TOGETHER.
PLATE TECTONICS THEORY THAT EARTH'S CRUST AND UPPER MANTLE ARE BROKEN INTO SECTIONS THAT MOVE AROUND ON A PLASTICLIKE LAYER OF THE MANTLE.
CONTINENTAL DRIFT THEORY THAT THE CONTINENTS HAVE MOVED SLOWLY TO THEIR CURRENT LOCATIONS.
MESOZOIC ERA MEANS "MIDDLE LIFE". GEOLOGIC ERA DOMINATED BY REPTILES AND THE BREAK-UP OF PANGAEA.
GYMNOSPERM MEANS "NAKED SEED" BECAUSE THE SEEDS ARE IN CONES AND NOT ENCLOSED IN FRUIT.
ANGIOSPERM FLOWERING PLANTS THAT PRODUCE SEEDS INSIDE FRUITS.
CENOZOIC ERA MEANS "RECENT LIFE". GEOLOGIC ERA DOMINATED BY MAMMALS AFTER THE EXTINCTION OF THE DINOSAURS.
Created by: smurray817
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