Evolution
What is the process of species changing over time?
Evolution
What are preserved remains or traces of past life called?
Fossils
What principle says Earth’s processes today are the same as in the past?
Uniformitarianism
What structures have the same function but different origins?
Analogous Structures
What is the preserved footprint or trail of an organism called?
Trace Fossil
What is large-scale evolution that can form new species called?
macroelolutions
What fossil type is used to help determine the age of rock layers?
Index Fossil
What is the time it takes for half of a radioactive substance to decay?
Half Life
What structures share common ancestry but may have different functions?
Homologous structures
What is the process used to determine the age of rocks using radioactive elements?
Radiometric dating
What idea explains how species change over long periods due to variation and natural selection?
Evolution
Why are fossils important in studying evolution?
Show evidence and change over time
What do index fossils help scientists do?
Determine rock age
What is a vestigial structure?
Body part with little or no function
What is a fossil that is widespread but only existed for a short time used for?
Dating rock layers
What is evidence for evolution found in fossils, DNA, and anatomy called?
Lines of evidence
How do fossils support the idea of evolution?
Show organisms changing over time
How does uniformitarianism help scientists interpret Earth’s history?
Uses current to explain past changes
Why are homologous structures evidence of evolution?
Show shared ancestry
What does the fossil record show overall about life on Earth?
Life that has changed over millions of years
How do different types of evidence work together to support evolution?
Show different patterns of ancestry
How does radiometric dating improve our understanding of fossils?
Gives exact ages instead of relative ages
How does half-life help scientists date fossils?
Measures radioactive decay
What did Charles Darwin think about humans
We are all closely related and came from the same species of primate
Where is Mr Haggerty from
What is Troy