Fossil Record
Geologic Time Scale
Petrified Wood is the most well known example of this process
What is Petrification?
An example of this type of fossil would be shells
Molds and casts
Index fossils are used to correlate the age of the ____________________
rock strata
a natural resource that can not be replaced withing a lifetime
nonrenewable resource
Preserved remains or traces of animals, plants, and other organism from the remote past
What is a Fossil
Two Types of Petrification
What is Replacement and Permineralization
An example of this fossil is plants and fish. Leaves a carbon film
Carbonization
Footprints, tracks, burrows, feces, borings are all examples of what fossils?
Trace fossils
Surface mining is a method used to remove ________ from the Earth's crust.
Coal
Fossils are found in ____________
Sedimentary rock layers
Bones, shells and wood are often fossilized in this manner.
What is Replacement
_____________ is excreted from certain plants, which is thought to protect them from insects and seals off plant injuries
Resin
This law helps scientists determine the age of fossils, relatively speaking
Law of Superposition
Special fossils that indicate to geologists the boundaries of geological time.
Index Fossils
The Study of Fossils
Paleontology
The original material is preserved rather than replaced.
What is Permineralization
Fossil resin is known as
Amber
Resources that can be used again and again and replaced in a lifetime
renewable resources
Fossilization process leaves behind a dark film on asedimentary rock
Cabonization
What is the condition for forming fossils?
Quick Burial of an organism
Both replacement and permineralization result in organic material converting into ____________ or a similar substance
What is stone
Mammoth's bodies have been found with skin, hair and even organs using this type of fossil
Tar and Ice
uranium 235, used to produce nuclear energy, is an example of?
Fissile material
Type of rock and fossil dating give the precise age of the rock or fossil
Absolute dating