Relative dating
Absolute Dating
Geologic History
RANDOM
RANDOM
100
WHICH LETTERED LAYER IS THE OLDEST
D
100
Radioactive carbon-14 dating has determined that a fossil is 5.7 × 103 years old. What is the total amount of the original C-14 still present in the fossil?
50%
100
The earliest insects were found during what era?
Paleozoic
100
Name a SPECIFIC rock you would most likely find a fossil in
ANY SEDIMENTARY ROCK
100
How old is the earth?
4,600 million years old (4.6 billion years)
200
What 2 rocks will form from contact metamorphism with layer D?
Quartzite and Hornfels
200
What are the two stable daughter products of Potassium-40?
Ar-40
Ca-40
200
What epoch + period did we first find diverse bony fish?
Early Cretaceous
200
What 2 characteristics must a fossil have to be considered an INDEX FOSSIL
-large geographic range
-short life span
200
What time period are humans found in?
Quaternary
300
Identify the correct order from YOUNGEST to OLDEST
A - C - B -D
300
Two rocks containing radioactive element A were taken from a mine. One had a mass of 2 grams; the other had a mass of 4 grams. Compared to the half-life of element A in the 4-gram sample, the half-life of element A in the 2-gram sample will be
The same
300
What is the OLDEST time period on our ESRT?
Cambrian
300
Which letter is the best index fossil
B
300
What is the K-T boundary?
a thin layer of iridium in the crust that formed 65 million years ago during an extinction event that is said to have killed the dinosaurs.
400
Define Uniformitarianism
Uniformitarianism - the idea that forces working on our planet today worked on our planet in the past in the same manner
•“The present is the key to the past”
400
How many grams of Carbon-14 are left if a 28,500 year old sample sample starts with 32 grams of carbon-14?
1 gram
400
Why are radioactive materials useful for measuring geologic time (what makes them useful)?
The decay at a predictable rate and are not influenced by environmental factors
400
Which rock layer is the OLDEST?
Siltstone
400
What CITY in New York State could you find a fossil of Cryptolithus?
Oswego, Utica, Watertown, Massena or Albany
500
What TWO index fossils are found in rocks of the same age? MUST LIST THE NAMES
Cystiphyllum (U) and Espirifer (Y)
500
Why can't we use Carbon-14 to determine the age of a dinosaur bone?
C-14 has a relatively short half-life and thus would not have enough C-14 to measure.
500
Identify the FULL name of the New York State Index Fossil
Eurypterus remipes
500
How many years ago was New York state on the EQUATOR?
359 MILLION YEARS AGO (+/- 10 million)
349-369 MYA
500
Which index fossil (BY NAME) belongs to a group of organisms that has lived for the LONGEST amount of time on earth?
GASTROPODS!
maclurites or platyceras