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13 Cards in this Set

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Paleontologist
scientist who studies fossils
Iquanodon
first dinosaur ever found
Odon
greek word for tooth
Hypothesis
a likely explanation of a problem
dinosaur
terrible lizard
fossils
any remains or trace of a once-living thing
Geologic time scale
a time scale that shows the history of the Earth and what lived when
Precambrian time
time unit from the formation of Earth to 570 million years ago, in which ocean animals developed
Paleozoic Era
from 570 million years ago to 270 million years ago, during which fish thrived
Mesozoic Era
from 250 to 60 million years ago during which reptiles were the main life form
Cenozoic Era
65 million years ago to present, when recent life evolved on Earth
vertebrates
an animal with a backbone
extinct
a species that no longer exists