What additional piece of information must Jenny have in order to determine the age of the zircon?
A. the thickness of sedimentary rock layers found near the zircon
B. the ages of any fossils found near her sample of zircon
C. the decay rates of radioactive uranium and lead
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Ответ:
activation energy
All chemical reactions, even exothermic reactions, need activation energy to get started. Activation energy is needed to bring reactants together so they can react. How fast a reaction occurs is called the reaction rate.