topic: absolute dating
DESCRIPTION
Topic: Absolute Dating. Absolute Dating is the real, true age of the rock. Examples - Tree Rings. Varves Layers of sedimentary rock that were formed in a lake from season to season. Radioactive Dating – -. Absolute Dating. Radioactive elements decay steadily . - - - - -. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/1.jpg)
Topic: Absolute Dating
Absolute Dating is the real, true age of the rock
![Page 2: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/2.jpg)
Examples - Tree Rings
![Page 3: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/3.jpg)
Varves •Layers of sedimentary rock that were formed in a lake from season to season
![Page 4: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/4.jpg)
![Page 5: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/5.jpg)
Radioactive Dating – -
![Page 6: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/6.jpg)
Absolute Dating
Radioactive elements decay steadily. 1. -2. -3. -4. -5. -
![Page 7: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/7.jpg)
![Page 8: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/8.jpg)
![Page 9: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/9.jpg)
Examples Front of ESRT
![Page 10: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/10.jpg)
Parent IsotopeDaughter Isotope
![Page 11: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/11.jpg)
![Page 12: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/12.jpg)
# of Half-Lives Half-Life of Carbon-14
Age of Rock (years old)
% of Carbon Remaining
% of Nitrogen
0
1
2
3
4
5
6
![Page 13: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/13.jpg)
Example of Half Life• Your rock contains 3
grams of C14 and 9 grams of N14. How old is your rock?
• -
![Page 14: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/14.jpg)
Example of Half Life
• A sample of wood that originally contained 100 grams of carbon 14 now only contains 25 grams of carbon 14. Approximately how many years ago was this sample part of a living tree?
• -
![Page 15: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/15.jpg)
Example of Half Life
• A rock contains 5 grams of Uranium 238 and 35 grams of Lead 206. How old is the rock?
• -
![Page 16: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/16.jpg)
Example of Half Life
• A fossil contains 5 grams of carbon 14 and 75 grams of Nitrogen 14. How old is the fossil?
• -
![Page 17: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/17.jpg)
Final Question:• A rock containing Potassium 40
undergoes 3 half lives, what is the age of the rock?
-
![Page 18: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/18.jpg)
Topic: The Earlier Earth
![Page 19: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/19.jpg)
Law of Uniformitarianism
“The present is the key to the past.”
-
![Page 20: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/20.jpg)
Earth is a Dynamic and Evolving Planet
• Changes in its surface
• Changes in life
![Page 21: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/21.jpg)
Origin of Our Solar SystemSolar nebula theory
![Page 22: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/22.jpg)
The Planets
![Page 23: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/23.jpg)
• Planetesimals have formed in the inner solar system, and large eddies of gas and dust remain far from the protosun.
• -
Sun and Rotating Cloud
![Page 24: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/24.jpg)
How old is the Earth?
• 4,600,000,000 = -
![Page 25: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/25.jpg)
An Early Earth• -• Heat sources:
• -• -• -
• -
![Page 26: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/26.jpg)
Earth’s Differentiation• Early Earth – -
• -
• Lighter silicates flowed up to form mantle and crust.
Why?
![Page 27: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/27.jpg)
The Moon• -
![Page 28: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/28.jpg)
![Page 29: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/29.jpg)
Earlier Earth Atmosphere• -
![Page 30: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/30.jpg)
Ocean Formation• -
![Page 31: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/31.jpg)
Exploring Geologic Time
What has been around for a long time to help geologist study the Earth?
![Page 32: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/32.jpg)
![Page 33: Topic: Absolute Dating](https://reader036.vdocument.in/reader036/viewer/2022062304/568138f1550346895da0a692/html5/thumbnails/33.jpg)
Final Question:
• The geologic history of an area can best be inferred by studying
A) erosional processes affecting the area
B) plants and animals now living in the area
C) present climatic conditions of the area
D) bedrock compositions and rock structures in the area