Show:
These categories
are mixed
and the points
are not
by difficulty
100
This is an element found in almost every organism, and an isotope of this is used to determine the age of a deceased organism.
What is carbon
100
This is the method of dating rocks when the amounts of parent and daughter materials are measured
What is radiometric or radioactive dating
100
A thin layer of Carbon atoms left when an organism is subjected to heat and pressure
What is carbonaceous film (or carbon film)
100
This states that in a sequence of undisturbed rocks, the oldest rocks are on the bottom and the rocks become progressively younger toward the top
What is the principal of superposition
100
Starting with 120 grams of C14, this is how many half-lives will pass to have just 15g of C14 remaining and 105 g of N14
What is 3
200
The principal stating that Earth’s processes occurring today are similar to those that occurred in the past
What is uniformitarianism
200
Remains, imprints, or traces of once-living, prehistoric organisms
What are fossils
200
What forms when sediments fill a mold and harden
What is a cast or cast fossil
200
The process that uses the properties of atoms in rocks and other objects to determine their ages
What is absolute dating
200
The same rock layers can be found in different locations, fossils can be used to do [this] to those layers
What is correlate (or compare)
300
Gaps in the rock record
What are unconformities
300
Tracks that show an organisms activity
What are trace fossils
300
Method by which order of events or age of rocks is determined by examining the position of rocks in a layer
What is relative dating
300
This is what is understood to be the root cause of most (if not all) unconformities
What is erosion
400
This is the kind of decay that results in the formation of a different element
What is radioactive (decay)
400
Actual organism or parts of organism protected from decay
What are original remains
400
A fossil of a species that existed for a short period of time and allows easier dating of the rock record
What is an index fossil
400
Preserved animal tracks are a type of these
What are trace fossils
400
The idea that says that if rocks are undisturbed, the older layers will be underneath the younger layers
What is the principle of superposition
500
This is the cavity that is left in a rock by a decayed organism
What is a mold
500
Hard, rocklike fossils where the original material has been replaced by minerals
What are permineralized remains
500
Being covered quickly to protect against decay and [this] are what is usually required for an organism to become a fossil
Having hard parts
500
This type of dating can only be done with a fossil that is younger than about 75,000 years old
Carbon dating / C14 Dating
500
A person who studies fossils and reconstructs the appearance of ancient animals
What is a paleontologist