front 1 Adaptation | back 1 An inherited trait that helps an organism survive. |
front 2 Evolution | back 2 The process of how organisms acquire adaptations over time. |
front 3 Ancestor | back 3 An organism from which others have descended |
front 4 Cladogram | back 4 A tree like diagram that displays revolutionary relationships among living spices and their ancestors |
front 5 Homologus structures | back 5 Body structures that have a common origin but do not necessarily perform the same function. |
front 6 Vertebrate | back 6 Animals with a backbone |
front 7 Fossil | back 7 A remnant or trace of an organism from the past, such as a skeleton or a leaf imprint, embedded and perserved in earths crust. |
front 8 Fossil record | back 8 A historical sequence of life based on the sequence of fossils. |
front 9 Natural selection | back 9 The process by which organisms with favorable adaptations survive and reproduce at a higher rate than organisms with less favorable adaptations. |
front 10 Invertebrate | back 10 Animals without a backbone |
front 11 Genetic variation | back 11 The variety of alleles in a population |
front 12 Extinction | back 12 this occurs when the environment changes and the adaptations of a species are no longer sufficient for its survival. |
front 13 Uniformitariansim | back 13 Using the present as a key to the past is consistent with the idea of |
front 14 Mass extinctions | back 14 Periods of large scale extinctions |
front 15 Absolute dating | back 15 A method of estimating the age of a rock sample in years |
front 16 Half life | back 16 The amount of time it takes for half of the unstable atoms in a sample to decay. |
front 17 Geologic time scale | back 17 A model of the history of life on earth. |
front 18 Geology | back 18 The study of earths formation and structure. |
front 19 Rock cycle | back 19 The process of rock formation and recycling. |
front 20 Superposition | back 20 The principle that states that in lawyers of sedimentary rocks the lowest layer were the earliest to be deposited. |
front 21 Relative dating | back 21 A method of sequencing events in the order in which they happened |
front 22 Paleontologist | back 22 A scientist who studies fossils |
front 23 Pangea | back 23 An ancient supercontinent that broke apart to fro today’s continents |
front 24 Plate tectonics | back 24 A theory that describes how the continents move |
front 25 Lithospheric plates | back 25 Giant pieces of solid rock on earths surface. |