1. Which of the following is true about the geologic time scale?
It divides the history of life in to periods of equal length.
It gives relative dates for different periods according to the fossil assemblages found there.
It was used before the discovery of radiometric dating to compute the absolute age of strata.
It is based on the principles of catastrophism.
2. You have a fossil of an ape-like hominin (human relative) that you know must be somewhere around 5 million years old. Which radiometric dating method would you use to get the most accurate date for it?
Potassium-argon
Carbon-14
Uranium-lead
Rubidium-strontium.