The belief that Earth changes only because of sudden
events is called _____________.
What is catastrophism
100
Figuring out whether a rock layer is older or younger than
the layers around it is called _________.
What is relative dating
100
Finding the exact age of an object is called _________
What is absolute dating
100
A _______ is an impression, or print, left in sediment where a plant or animal was buried.
What is mold
100
__________ study fossils of ancient plants
What is Paleobotanists
200
The theory that the Earth’s features form only
because of small changes over long periods of time is
called ______________
What is uniformitarianism
200
An _______ forms when melted rock moves into cracks in rock layers and then cools.
What is intrusion
200
A radioactive isotope is also called a _____________
What is parent isotope
200
Sometimes, organisms such as insects are caught in
sticky tree sap. If the sap hardens around the insect, a
fossil is created. Hardened tree sap is called ______
What is amber
200
I started with 68 mg of the wonder Guiden Rock. After 3 half-lifes......how many mg's are left
What is 8.5mg
300
The study of
fossils and ancient life is called ____________
What is paleontology
300
The idea that younger rocks lie above older rocks is called ____________
What is superposition
300
Atoms of an element that have different numbers
of neutrons are called _________
What is isotopes
300
Other fossils are simply signs, such as footprints, that an organism was alive. These fossils are called __________
What is trace fossils
300
A ___________ is a place where part of a sequence of
parallel rock layers is missing.
What is disconformity
400
The root onto means “_____.”
What is LIFE
400
An __________ is a break in, or a missing part of, the geologic record
What is unconformity
400
The _________ of a radioactive isotope is how long it
takes for half of a sample of the isotope to decay.
What is half-life
400
A ________ is an object that forms when sediment fills a
mold and becomes rock.
What is cast
400
He came up with the theory that the Earth’s features form only because of small changes over long periods of time
Who is James Hutton
500
The root paleo means “____.”
What is old
500
The __________ is a detailed series of rock layers.
It contains all the known fossils and rock formations
on Earth, ordered from oldest to youngest.
What is geologic column
500
_____________ is the process of determining the
absolute age of a sample based on the ratio of parent isotope
to daughter isotope.
What is Radiometric dating
500
During __________, minerals replace all or part of an
organism’s tissues.
What is petrifaction
500
He reintroduced the idea of uniformitarianism in the 1800's after its founders theory was not accepted