Fossils, isotopes, Oh My!
Radiocarbon dating has a half life of 5,730 years.
This would be the age of a certain fossil after 4 half lives.
What is 22,920 years?
Common or rare? Fossils must be this to be considered an index fossil.
What is common?
The approximate age of the earth?
What is 4.6 Billion years old?
Raquel was dating a meteorite in her lab.
She was using Potassium-Argon Dating which has a half life of 1.25 billion years old.
She notes that 2 half lives have passed.
How old is the meteorite based on this information.
What is 2.5 billion years old.
If potassium-40 breaks down to Argon-40, this would be the stable isotope.
What is Argon-40?
The half life of Potassium Argon dating.
What is 1.25 billion years?
These materials are used in radiometric dating to determine the age of objects.
What are isotopes?
Juan used radiocarbon dating to date a fossilzed feather he found.
Radiocarbon dating has a half life of 5,730 years.
He notes that 3 half lives have passed.
How old is the fossilized feather?
What is 17,190 years.
These are the unstable isotopes.
What are parent isotopes?
The sample from the fossilized mummy showed that it's radiocarbon dating age was 11,460 years.
Radiocarbon dating has a half life of 5,730 years.
How many half lives have passed for this mummy sample?
What is 2 half lives?
A property of radioactive decay that allows the age of the rock to be determined in years.
What is "happens at a set rate"?
Sebastian was radiocarbon dating a fish fossil, he noted that 8 half lives have passed.
This is the age of the fish fossil.
What is 45,840 years.
For a fossil to be an index fossil they must be found where?
Over a large area
Horseshoe crabs, spiders, and scorpions are the closest living relative of this ancient organism.
What are trilobites?
Uranium-238 has a half life of 4.5 billion years
Uranium-235 has a half life of 704 billion years
Potassium-40 has a half life of 1.3 billion years.
These isotopes be used to date rocks because of this.
What is "they all decay at a set rate"?
Jennifer uses Postassium-Argon dating with a half life of 1.25 billion years to date an aquatic plant fossil.
4 half lives have passed. How old is the fossil?
What is 5 billion?
Features must be different for other fossils for it to be classified as this.
What is an index fossil?
I found fossilized bone of a Wooly Mammoth.
Wooly Mammoths lived about 5 million years ago.
This would be the best kind of absolute dating to do.
What is Potassium-Argon Dating?
The half life of Uranium-Lead dating.
What is 4.5 billion years?
Mayte has made an amazing discovery, a small 1 in piece of a meteorite has turned out to be part of an ancient planet.
She uses Uranium-Lead dating with half life of 4.5 billion years, to date it.
5 half lives have past. How old is this piece of an ancient planet?
What is 25,500,000,000 billion years old?