Fossil – The remains or stone impression of a long-deceased organism.
Cast – when fossils consist of sediment that filled the molds and hardened.
Modls- cavities or molds in rocks
Species - a group of related animals or plants that is smaller than a genus.
Evidence – a detailed information or proof
Geologic Time –is a “calendar” for events in the Earth History.
Homologous Structure – Structures that are shared between different organisms and that originated with a common ancestor.
Analogous Structure-The exact opposite of homologous structures; they have very different structures but the same function.
Darwin (Charles Darwin)- an English naturalist, best known for his contribution to the Science of Evolution. He first proposed that all species of life have descended over time from common ancestors is now widely spread and considered a fundamental concept in science.
Lamarck (Jean Baptiste Lamarck)- French naturalist who proposed that biological evolution occurred and proceeded in accordance with natural laws.
Ancestor – a person, typically one or more remote than a grandparent, from whom one is descended.
Era –a time of several hundred million years. In the GTS, having the longest period of time.
Period- a geologic time unit shorter than era
Epoch- a geologic time unit shorter than periods
Cenozoic –Meaning “New Life”. It is the current and most recent of the 3 geologic eras of the Phanerozoic Eon.
Mesozoic- is an interval of geologic time from about 252 to 66 million years ago. It is also called the Age of Reptiles and the Age of Conifers.
Paleozoic –is the earliest era of 3 geologic eras of the Phanerozoic Eon. It is the longest of the eras and is subdivided into six geologic periods.
