COPy 63. Geological Time Fossil record reading 64. Relative Dating Notes 65. Relative dating lab 66. Absolute Dating Notes 67. Radioactive Dating lab

Relative Dating vs Absolute dating Pg 64

Relative dating Determining the relative order of past events (i.e., the age of an object in comparison to another), without necessarily determining their absolute age Puts things in sequence order

relative dating Look at fossils or rocks and be able to put them in order

COPy 63. Geological Time Fossil record reading 64. Relative Dating Notes 65. Relative dating lab 66. Absolute Dating Notes 67. Radioactive Dating lab

Relative Dating vs Absolute dating Pg 66

Absolute dating Tells a more accurate date for fossils by using a number age or range More like calendar dating Uses observations of the fossil to tell about the past

Half Life The time required for the amount of something to fall to half its initial value. molecules go through it after a long time giving us the ability to calculate age

Carbon dating -Using the decay of carbon to determine the date of an object -Carbons half life is 5730 years -Is limited to 75,000 into the past and piece of fossil must be converted to CO2

Potassium-argon dating Can see up to 1.3 billion years into the past Only reviles the last date it was heated up since argon is a noble gas (doesn’t really bind)