Evolution- Change in life forms over time Why do things change? How do they change?
Relative Time. Relative Dating Relative dating – events are placed in a sequence, but actual occurance dates are unknown. Who is older, Mr. Kopp or Justin.
Absolute Dating. J F M A M J J A S O N D J Earth Forms Earth Cools First Life Abundant Oxygen Multicellular Organisms Plants and Animals Dinos 15-25 Humans.
Types of methods Superposition Relative dating Absolute dating Carbon 14 Potassium-argon or Rubidium-strontium.
... or how to make sense out of Ch. 8 of the text... Prehistoric Cultures Tim Roufs section ©2009 Class Slides Set 10A Special Skills Used to Study Early.
Relative and Absolute Dating. Relative dating - the age of a rock, fossil, or other feature measured compared to another.
Whos First? Copyright © Houghton Mifflin Harcourt Publishing Company What is relative dating? Scientists try to find out the order in which events happened.
Dating How can scientists determine the age of rocks and fossils?
1 Earths History. 2 Planet Earth is approximately 4.5 X 10 9 years old –Rocks of the crust provide clues to Earths past By analyzing these clues we can.
Absolute Dating. A.D. is used when geologists want to know the actual numerical age of a rock layer. A.D. is used when geologists want to know the actual.
Haudenosaunee Unit Exam Review Power Point This power point is one of the review tools for the unit exam. You also need your notes and your crossword puzzle.
Geologic Time We know its BIG…but HOW do we know that?