Challenge yourself to recognize the most important fossil discoveries and the stories behind them.
What is the study of fossils called?
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Paleontology
What is the name of the largest-known dinosaur, discovered in Argentina and estimated to be around 100 feet long?
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Argentinosaurus
Which type of fossilization occurs when the original material is replaced with pyrite?
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Pyritization
What is the name given to the first appearance of a species in the fossil record?
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First occurrence
What is a mold fossil?
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A fossil formed when sediment fills in the impression left by an organism
What is the term for a gap in the geological record where rock layers are missing due to erosion or non-deposition?
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Unconformity
What type of fossil preserves the three-dimensional form of an organism without any of its original material?
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Replacement fossil
Which type of fossilization occurs when the original material is replaced with silica?
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Silicification
Which type of fossil is formed by the remains of plants or animals that have been compressed over time?
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Compression fossils
What is a deinonychus?
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An extinct carnivorous dinosaur with feathers and a sickle-shaped claw on each foot
What is a mosasaurus?
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An extinct marine reptile with a long, pointed snout and paddle-like limbs
What is a archaeopteryx?
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An extinct bird-like dinosaur with feathers and teeth
What is the oldest-known multicellular organism on Earth?
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Bangiomorpha pubescens
What is the name of the extinct group of marine invertebrates characterized by their distinctive lophophore feeding structures?
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Graptolites
What is a triceratops?
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An extinct herbivorous dinosaur with three horns on its head
What is the name of the extinct group of marine invertebrates characterized by their distinctive cup-like body structure?
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Cystoids
What is a trilobite?
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An extinct marine arthropod with a hard, segmented exoskeleton
What is the name of the extinct group of jawless fish that were among the first vertebrates on Earth?
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Ostracoderms
What is the name of the prehistoric plant that is often referred to as a living fossil?
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Ginkgo
What is the name of the phenomenon where certain organisms appear to disappear from the fossil record only to reappear later?
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Lazarus taxon
What is the name of the prehistoric insect that resembled a dragonfly but had a wingspan of up to 2.5 feet?
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Meganeura
What is the name of the extinct group of cephalopods characterized by their coiled shells?
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Ammonites
What is the name of the prehistoric bird that had a wingspan of up to 24 feet?
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Quetzalcoatlus
What is the name of the principle stating that younger rocks lie above older rocks in undisturbed sequences?
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Principle of Superposition
What is a stegosaurus?
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An extinct herbivorous dinosaur with bony plates along its back
What is the name of the extinct group of marine invertebrates characterized by their distinctive two-part shells?
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Brachiopods
What is a ichthyostega?
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An extinct amphibious tetrapod with legs and gills
What type of rock are most fossils found in?
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Sedimentary rock
What is the name of the extinct bird that was the largest bird to ever exist?
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Elephant Bird
What is the name of the extinct group of marine invertebrates characterized by their distinctive spiral-shaped shells?
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Gastropods
What is the name of the prehistoric reptile that had a long, narrow snout and fed on fish?
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Tanystropheus
What is the name of the theory that explains the sudden disappearance of many species in the fossil record?
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Punctuated equilibrium
What is a dunkleosteus?
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An extinct armored fish with sharp, crushing jaws
What is a woolly mammoth?
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An extinct elephant-like mammal with long, curved tusks and shaggy fur adapted for cold environments
What is a glyptodon?
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An extinct armored mammal similar to a giant armadillo
What term describes the process of determining the age of a rock or fossil based on its position in layers of sedimentary rocks?
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Relative dating
What is the name of the prehistoric fish that had a long, thin body and needle-like teeth?
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Xiphactinus
Which scientist is credited with developing the concept of uniformitarianism, which states that the same geological processes observed today have operated throughout Earth's history?
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James Hutton
What is a velociraptor?
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An extinct carnivorous dinosaur with feathers and a sickle-shaped claw on each foot
What is a mammoth?
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An extinct elephant-like mammal with long, curved tusks and shaggy fur
Which type of fossilization occurs when minerals replace the original organic material?
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Permineralization
Which extinct marine arthropod group is often used as an index fossil?
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Trilobites
What is the name of the extinct group of marine invertebrates characterized by their distinctive spiny skin?
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Echinoidea
What is a cast fossil?
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A fossil formed when minerals fill in the cavity left by a decomposed organism
What is the name of the geologic time period known as the 'Age of Fishes'?
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Devonian Period
What is an ammonite?
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An extinct marine mollusk with a spiral shell
What is a smilodon?
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An extinct carnivorous mammal with long, curved canine teeth also known as a saber-toothed tiger
What is the name of the ancient shark that lived during the time of the dinosaurs?
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Megalodon
What is the name of the oldest known fossil?
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Stromatolites
What is the name of the prehistoric mammal that had a large, curved horn on its forehead?
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Megacerops
What is a helicoprion?
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An extinct shark with a spiral jaw covered in teeth
What is a plesiosaur?
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An extinct marine reptile with a long neck and four flippers
Which fossil site, located in Germany, is famous for its well-preserved specimens from the Jurassic period?
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Solnhofen Limestone
Which extinct marine reptile group includes the ichthyosaurs and plesiosaurs?
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Sauropterygia
What is the name of the prehistoric turtle that had a shell measuring over 13 feet long?
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Archelon
What is a megalodon?
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An extinct species of shark that lived millions of years ago
What is an index fossil?
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A fossil used to date rocks and determine the relative ages of geological events
What is a saber-toothed cat?
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An extinct carnivorous mammal with long, curved canine teeth
What is a ichthyosaur?
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An extinct marine reptile with a streamlined body and large eyes
Which type of fossilization occurs when the original material is replaced with carbonate minerals?
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Carbonate replacement
What is the name of the extinct group of marine invertebrates characterized by their distinctive calcite skeletons?
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Rugose corals
What is the name of the extinct group of marine invertebrates characterized by their distinctive five-fold symmetry?
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Blastoids
What is the name of the process by which a once-living organism becomes a fossil?
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Fossilization
What is the term for a fossil that is an impression left by an organism?
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Imprint Fossil
Which type of fossil consists of a natural mold filled with sediment or mineral deposits?
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Cast fossil
What is a dimetrodon?
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An extinct carnivorous reptile with a sail-like structure on its back
Which type of organism is most commonly found as a trace fossil?
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Invertebrates
What is the name of the famous fossil of a human ancestor discovered in South Africa in 2013?
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Homo naledi
What is the name of the prehistoric mammal that had a long, narrow snout and fed on insects?
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Phorusrhacos
What is a tyrannosaurus rex?
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An extinct carnivorous dinosaur with small arms and a large head with sharp teeth
What is the name of the prehistoric mammal that had a long, curved horn on its nose?
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Elasmotherium
What is a brachiosaurus?
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An extinct herbivorous dinosaur with a long neck and forelimbs longer than its hind limbs
What is the name of the prehistoric mammal that had a short, stocky build and was covered in fur?
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Glyptodon
What is the name of the prehistoric mammal that had a long, curved tusk and roamed North America during the Ice Age?
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Mammut americanum
What is a coelacanth?
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An extant fish once thought to be extinct for millions of years
What is petrification?
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The process by which organic material is replaced with minerals
What is the name of the largest dinosaur ever discovered?
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Argentinosaurus
What is the name of the extinct group of marine invertebrates characterized by their distinctive star-shaped plates?
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Asteroidea
What is the name of the extinct group of marine invertebrates characterized by their distinctive tooth-like elements?
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Conodonts
What is a trace fossil?
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A fossilized footprint, trail, burrow, or other evidence of an animal's activity
What is the name of the prehistoric reptile that had a bony crest on its head?
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Parasaurolophus
What is the name of the prehistoric mammal that had a large, flat horn on its head?
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Uintatherium
What is the name of the prehistoric reptile that had a sail on its back?
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Dimetrodon
Which era saw the emergence of the first fish?
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Paleozoic Era
What is the name of the prehistoric mammal that had a long, curved tusk and roamed Europe and Asia during the Ice Age?
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Elasmotherium
What is the name of the prehistoric reptile that had a long, slender body and four flippers?
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Plesiosaur
What is carbonization?
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The process by which organic material is compressed and preserved as a thin film of carbon
What is the name of the extinct elephant-like mammal that had long tusks and roamed North America during the Ice Age?
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Woolly Mammoth
What is the name of the prehistoric reptile that had a frill around its neck?
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Triceratops
What is the name of the prehistoric reptile that had a long, narrow snout and fed on small animals?
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Teratosaurus
What is a stromatolite?
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A layered structure formed by the growth of cyanobacteria (blue-green algae)
What is the name of the prehistoric reptile that is often referred to as a flying dinosaur?
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Pterosaur
What is the name of the process where minerals replace organic matter in a fossil?
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Permineralization
What is the name of the prehistoric reptile that had a long, narrow snout and fed on plants?
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Longirostris
What are fossils?
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The preserved remains or traces of organisms that lived in the past
What is the name of the prehistoric crocodile that had a snout resembling that of a dolphin?