Fossils
What is evolution?
The change in species overtime
Does relative age dating give an exact date?
No, it’s called relative age dating what did you expect.
What is a half life?
Half life is the time it takes for a radioactive material to decay, transform, or be completely eliminated.
What was the rocks name in my presentation?
tommijoe
What is one new vocabulary word you learned?
Radiocarbon dating,Uranium-Lead, radioactive decay, uniformitarianism, mineral replacement, index fossils
What type of fossil encases an animal in sticky tree sap?
Amber fossil
Give me one law/principle that is used for relative age dating.
Law of superposition or the principle of cross-cutting
What is absolute age dating?
Is it the processed used by scientists to get an exact date of an object.
What is the geological time scale?
A record of earths history
What is mineral replacement?
pore spaces of an organism’s buried hard parts are filled in with mineral from groundwater
Are fossils the actual remains of animals?
No
What does the law of superposition state?
The law of superposition states that if rock layers are undisturbed, the oldest ones will be on the bottom.
What does radiocarbon dating used for?
It is used for wood, cloth, or bones.
What is the longest time period in the Geological time scale
Eon
What is uniformitarianism?
the geological principle that the same slow, natural processes shaping Earth today have happened in the past.
What is an index fossil?
An index fossil is a fossil that is very abundant, very widespread, and are easy to recognize.
What does the law of uniformitarianism state?
The law of uniformitarianism states that anything that has happened (ex.waves) have been the same since the earth started to form.
What is the half life of Lead?
704 million years
Name one eon, one era, one period, and one epoch
Look in the book because I’m not writing all those down
What are index fossils?
They are fossils that are easily recognized, abundant, and widely distributed geographically.
Name three of the different fossil types
Trace, Amber, Cast, Mold, Carbon film
Give me two differences between relative age dating and absolute age dating.
Relative age dating is used for the order of events, it gives a relative age, uses fossils to determine whats younger and older, and uses techniques like superposition. Absolute age dating gives an exact date, uses, the half life of radioactive materials, uses radioactive materials, and uses many different methods such as uranium-lead dating.
What does carbon 14 become as it slowly decays?
Nitrogen 14
What are eras measured by?
Major geographical changes, major biological events, and major environmental changes.
What is radioactive decay?
When an unstable atom nucleus releases energy and particles to transform into a more stable nucleus, which often turns it into a different element.