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Crucigrama Sopa de Letras Hoja de Trabajo
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Fossiliferous: All about fossils

Horizontales
Evidence of ancient life
To pack more closely together
The changing of an organism or sediment into stone.
The residue of carbon left after the rest of an organism has dissolved
The study of fossils
The preservation of the actual organism
The replacement of original material with minerals
Verticales
Preserved remains or traces of plants or animals that lived at least 10,000 years ago.
The process through which an organism is preserved as a fossil
Hardened imprint of a plant or animal from long ago
Fossil formed when sediments harden over or inside an organism
Evidence of a once living plant or animal, but not the plant or animal itself