Types of Fossils
Aging Fossils
Timescales
Half Life
Activities
100
The 3 types of original remains.
What is ice, amber, and tar?
100
What is the difference between relative and absolute age?
What is relative is younger vs. older comparisons, and absolute is the actual age.
100
How old is earth?
What is 4.6 billion years old?
100
Why do scientists use half life?
To get the absolute age of fossils and rocks.
100
Your story on what happened during the Footprints Activity #91
What is (answers vary)
200
What does a thick tree ring tell you?
What is a very rainy season?
200
How do scientists find an absolute age of a rock or fossil?
What is using the half-life or radioactive dating?
200
List 2 causes for mass extinctions.
Plate tectonics, Moving land masses, volcanoes, meteors
200
If oxygen has a half life of 10 years, how many years will it take for 75% of it to change?
What is 20 years?
200
What is a stratigraphic column?
What are layers on top of layers of rock such as a drill core or the side of a cliff?
300
Two types of trace fossils
What are footprints and feces?
300
What is half life?
What is time it take for half of the radioactive atoms to decay.
300
List 3 out of the 4 divisions of time.
What is eons, eras, periods, and epochs
300
How much of an element remians after 2 half lives?
What is 25%?
300
The difference between an observation and an inference.
Observation is a fact and not argued while an inference is just an explanation to an observation and can be argued.
400
3 types of particles that scientists look for in ice cores
What is pollen, dust, and volcanic ash
400
List 2 facts from the law of superposition.
What is oldest rocks on the bottom, youngest on top, fossils only form in sedimentary rock?
400
This led to the beginning of the quarternary period.
humans on earth
400
Gold has a half life of 550 years. How many half lives have taken place after 2200 years?
What is 4 half lives?
400
Your estimate of M&M's after 2 throws have been completed.
What is around 20 M&M's?
500
The difference between a hardened remain and an original remain.
A hardened remain is not the real thing because cells have been replaced with minerals, but an original remain is.
500
What can igneous rock tell us about the nearby sedimentary rock?
What is the relative age (sedimentary is older)
500
The current eon we are in now AND how long we have been in it.
Phanerozoic, 544 mya
500
How much of an element has changed after 4 half lives?
What is 93.75%
500
The oldest fossil we observed in Activity #90
What is Elrathi kingi?
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