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| that living organisms can arise from nonliving matter |
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| geologic explanations for the movement of continents over Earth's think, liquid interior |
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| idea that living organisms arise only from other living organisms |
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| ordered structures formed by heating amino acid in solutions, producing clusters resembling living cells that carry out some, but not all, of the functions of life. |
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| group of prokaryotes, similar to ancient fossil bacteria that produce glucose by chemosynthesis rather than by photosynthesis. They could live in hot sulfur springs and deep-sea vents. |
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| any evidence of organisms that lived in the past usually found in sedimentary rock; scientists study fossils to look for evolutionary clues |
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| when a mold of an organism is created, minerals in the surrounding rock, producing a replica of the original organism, often fill it |
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| when an organism is buried, it can decay, leaving an empty space in the rock that is the exact shape of the organism. |
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| sometimes fossils form before sediments harden into rock. Thin objects, such as leaves of feathers, falling into sediments such as mud often leave imprints. |
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| one who studies ancient life |
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| one who studies the physical structure and processes of the Earth |
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