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Fossils Paleontologists- study fossils Fossil Record evidence for hist. of life and how species have changed over time Extinct- some species have died out
Fossils Fossils Form buried in rock (sand/silt/clay) hardens around organism preserves an imprint of specimin
dating Relative dating age of a fossil is compared to other fossils in other layers of rocks Index fossils easily recognized organism that only existed for a short period of time
dating Radioactive dating C-14 dating fossils younger than 60,000 years Potassium-40 dating fossils billions of years old
Time Geological Time represents evolutionary time line of earth Time is divided into eras Eras is divided into periods
The Fossil Record Chapter 17.1.
Direct Evidence Indirect Evidence
Evolution- Change in life forms over time
A trip through geologic time Chapter 10 page 310
8.3 Radioactive Dating.
8.3 Radioactive Dating 7.4.d Students know that evidence from geologic layers and radioactive dating indicates Earth is approximately 4.6 billion years.
Evolution of Populations ANCIENT LIFEFORMING FOSSILS.
Chapter 17: The History of Life Calif. Science standards 8e
Mr. Karns Biology Fossils.
Outine 17-1: The Fossil Record
Geologic Time and Relative Dating. Review Geologic Time: begins when the Earth began 4.6 billion years ago Includes: Precambrian Time (4.6 billion years.
Though we cant be certain, scientists have suggested that the earth was very hot due to volcanoes and meteorites hitting the earth Sometime around 4.4.
Do Now 8/19/11 How does the existence of homo-sapiens (100,000 years ago) compare to the length of the earth? How does the impact humans have had on the.
The Fossil Record.
Fossil Evidence of Evolution
THE HISTORY OF LIFE SC STANDARD B-5 Students will demonstrate an understanding of the basis of evolution.
Notes on Fossils (from top left) are of a ammonite (marine); T-Rex; an ancient fish and a trilobite (marine). Earth/Space.
A. Direct Evidence B. Indirect Evidence. Visible evidence that organisms have changed over time Ex. – Fossils.
The Fossil Record Chapter 6 Section 3.
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