Fossil Evidence
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10 Terms
Relative Dating
Method of determining the age of a fossil by comparing its placement with that of fossils in other layers of rock
Absolute Dating
A technique used to determine the actual age of a fossil
Teeth Comparison: carnivore
incisors- sharpest most forward teeth; for cutting/ gnawing
canines- longer teeth behind incisors; used for tearing
Teeth comparison: omnivore
molars- used for grinding
canines- under-developed
Teeth comparison: herbivores
long, flat teeth that continuously grow
extant
Alive
index fossil
a fossil that is useful for dating based on which strata in which it is found.
radioactive decay
The breakdown of a radioactive element, releasing particles and energy; progress in decay can be used to help determine age.
fossil record
Chronological collection of life's remains in sedimentary rock layers
transitional fossils
link older extinct fossils to modern species
