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Crucigrama Sopa de Letras Hoja de Trabajo
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Dichotomous Key

Horizontales
A living thing
The major divisions of geologic time
The state of living
The order and relative position of rock strata and their relationship to the geologic time scale
Method of dating specimens by analyzing the decay of radioactive isotopes in rock
A common apology of a tectonic plate
Changes over time in response to the environment
A subdivision of geologic time shorter than a period
Verticales
Variation of life forms within or between species
Span of time in which specific systems of rocks were formed
A dinosaur who is on time
A scale that divides the history of the earth into meaningful periods
Large-scale movement of organisms of a species to a different environment
A major subdivision of geologic time within an eon
The dying out or extermination of a species