Fossil Formation
What has to happen to make sedimentary rock?
Lots of pressure.
What is one of the most important fossil sites in BC?
The Burges Shall.
True or false!
Fossils closer to the top of the ground are older than the ones deeper in the ground.
False!
How much carbon is left after 11,400 years of the animal being dead? (please answer in percentage.)
25%.
Rocks contain radioactive chemicals that_______.
Breakdown.
What type of fossil is it when scientists find a dinosaurs footprint?
Trace fossil.
How many eyes does the Opanibia have?
5
What is relative dating?
Seeing which fossils are older by how deep in the ground they are.
If a plant dies and a week goes by will it have A= the same amount of carbon. B= A less amount of carbon. C= A more amount of carbon.
A.
When animals ____ the ______ the carbon 14 is transferd to the animal.
Eat. Plants.
What happens during deposition?
Sedimentary that covers the organism builds up over time and gets squished into sedimentary rock.
What is the big shrimp like predator with claws called?
Anomalocaris.
True or false.
Most organisms that have ever lived (99%) are extinct.
True.
If an animal lived millions of years ago could carbon 14 be used when it died?
no.
It takes about ______ years for half of the radioactive atoms in a sample of carbon 14 to change to stable nitrogen.
5,700.
What are the 4 steps of fossilization?
Sedimentation, deposition, decay, crystallization.
What are the names for the 3 fossils found in The Burges Shall?
Anomaloris, Opanibia, Wiwaxia.
Fossils provide a _______ sequence of life known as the __________ ____ _____.
Historical. geological time scale.
Which is the best for dating earth? A= uranium H.L 713000000yrs. B= Thorium H.L 13900000000 yrs. C= Plutonium H.L 2400000yrs.
A.
If it takes 5,700 to get rid of half the carbon 14 in a dead animal, plant, etc. How much carbon 14 would be left after 17,100 years? (in percentages please.)
12.5%.
Calcium forms ______ _________ in bones making it really hard.
silicate crystals.
The ____ _____ ___ ______ _____ are known for ammonite fossils?
Golf island and Vancouver island.
______ are solidified ______ or ______ for once living organisms.
Fossils. Remains. Imprints.
If an animal lived near and died in the Labera Tar Pits (found now in LA California) 40.000 years ago could carbon 14 be used to determine when it died?
no.
The half-life is the amount of time it takes for half of the chemicals in a rock to breakdown or turn into ______ _________.
Another chemical.