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Chapter 4 Fossils
Terms in this set (14)
What must organisms do when their environment changes?
Organisms must constantly adapt and refine their characteristics to become better suited to their ever-changing environment
The geologic time scale is a calendar of Earth's history based on what?
it is based on fossil evidence found in rocks
What do scientists study using this picture from the past?
to all fossils that have been found since the study of fossils began
Hyracotherium was ancestor to modern day horse. Its environment changed from forest to prairies- like grassland. The Hyracotherium had to adapt to the changes. Fully explain the changes/ adaptions/ evolution it experienced
The animal grew taller to see over the grasses,developed longer legs to outrun predators, and developed tougher teeth to eat grasses.
List the geological events that are more likely to preserve tissues of orgamisms
What are two ways fossils are used to determine age of rocks?
How is relative dating done?
is done through the use of index fossils and sedimentary rock layers
The remains of species that existed on Earth for relatively short periods of time
it allows you to know the order in which layers formed, or how old a layer is relative to other layers
A break in the sedimentary geologic record known as unconformity means there was a time when no deposition occurred
Fossils are useful
in determining how species have changed over time
A fosil recognized as unique to a certain time period known as
an index fossil
One event that does not lead to fossil formation is
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