| A | B |
|---|
| fossil | Evidence of an organism that lived long ago. |
| trace fossil | Fossil made by the imprint of an animals feet. |
| amber | Hardened tree sap that may contain insect fossils. |
| paleontologist | Scientist who studies ancient life. |
| sedimentary | Type of rock which may contain fossils. |
| spontaneous generation | The idea that nonliving material can produce life. |
| biogenesis | The idea that living organisms come only from other living organisms. |
| Francesco Redi | Scientist whose experiment with meat in jars disproved spontaneous generation. |
| Louis Pasteur | His swan-necked flask experiment disproved the spontaneous generation of microorganisms. |
| Miller | This scientist attempted to recreate earth's early atmosphere and create life "from scratch". |
| protocell | A large, ordered structure, enclosed by a membrane, that carries out some life activities, such as growth and reproduction. |
| archaebacteria | Prokaryotes that live in harsh environments such as hot springs. |
