Fill in the Blanks FossilsOnline version Select the correct word to fill in the blanks. by Virtual School Bahamas 1 Fossils are the or traces of past life found in sedimentary rock . Scientists called study fossils . Wood , bones , teeth and shells are preserved or by being buried . As they harden , the remains become trapped in rock and form . Some fossils show changes long - dead animals made in their surroundings . These are called Fossils . Tracks , burrows , and worm holes are some examples of trace fossils . They tell how an animal might have moved , how big or small it might have . A is an imprint made by the outside of a dead plant or animal . A mold forms when washes animal or plant remains out of rock . Sometimes sediment or minerals fill a mold and form a .
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