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Grade 4 C-2 Sci. Def

Chapter 2 Fossils

TermDefinition
Fossil A preserved clue to life on Earth long ago
Trace fossil A fossil that shows changes that long-dead animals made in their surroundings
Mold (fossil) A fossil imprint made by the outside of a dead plant or animal
Cast A fossil formed when sediments or minerals fill a mold; it takes on the same outside shape as the living thing that shaped the mold
Fossil fuel Fuel formed from the remains of organisms that lived long ago
Petroleum A thick brown or black liquid fossil fuel; crude oil
Natural gas A gas, mostly methane, usually found with petroleum
Peat A soft, brown material made up of partly decayed plants; first stage of coal formation
Lignite A soft, brown rock; the second stage of coal formation
Bituminous coal A fairly hard, dark brown or black rock; third stage of coal formation
Anthracite A hard, black rock; fourth stage of coal formation
Created by: scscolts
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