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Geologic Time Crossword Puzzle

Teacher: Jared DeVille
Horizontales
A unit of geologic time that is a division of a period.
The geological era after the Mesozoic era. It is sometimes known as the age of mammals and began 65 million years ago.
a backbone or spinal column
Lacking a backbone or spinal column
the geologic time period between Hadean Time and the Cambrian Period, often subdivided into the Archean and Proterozoic Eras, comprising most of the earth's history and marked by the appearance of primitive forms of life.
the era of geologic time from about 542 to 251 million years ago.
The geological era between the Paleozoic and Cenozoic eras: 248 to 65 million years ago. It is sometimes called the “Age of Dinosaurs.”
Any of various cold-blooded, usually smooth-skinned vertebrates of the class Amphibia, characteristically hatching as an aquatic larva with gills and then transforming into an adult having air-breathing lungs.
Verticales
A supercontinent that included all the world's landmasses in the late Paleozoic and, according to the theory of plate tectonics, subsequently broke apart into Laurasia and Gondwana.
The extinction of a large number of species within a relatively short period of time, as between the Cretaceous and Tertiary Periods when three-quarters of all species on earth, including most dinosaurs, became extinct
A unit of time, longer than an epoch and shorter than an era.
A period of time as reckoned from a specific date serving as the basis of its chronological system.
Any of various warm-blooded vertebrate animals of the class Mammalia, including humans, characterized by a covering of hair on the skin and, in the female, milk-producing mammary glands for nourishing the young.