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Geology 1
Chapters 1 Speedback Assignment
Question | Answer |
---|---|
Which one of the following periods of the Paleozoic Era was not defined in Great Britain? | Permian |
Discovery: superposition of strata | Individual best known for it: Nicolaus Steno |
Discovery: faunal succession | Individual best known for it: William Smith |
Discovery: extiniction and catastrophism | Individual best known for it: Georges Cuvier |
Discovery: natural selection | Individual best known for it: Charles Darwin |
Discovery: uniformitarianism | Individual best known for it: James Hutton |
The atomic number of an atom is determined by adding up what? | the number of protons in the nucleus |
Which of the following parent-daughter nuclides has the longest half-life? | rubidium 87: stronium 87 instead of uranium 235:lead 207, carbon 14:nitrogen14, potassium 40:argon 40, or uranium 238:lead 206 |
When the nucleus of an unstable radioactive atom fires off a positively charged particle comprised of two protons and two neutrons (a helium nucleus) it has undergone what? | alpha decay |
Approximately how many years old is the Earth? | 4.6 billion |
A half-life is defined as what? | the amount of time it takes for half of the original parent atoms to decay to more stable daughter products |
Roderick Impey Murchison was instrumental in naming three of the Paleozoic periods. Which of the following was not named by him? | Pennsylvanian as opposed to Deconian, Silurian, or Permian |
What is the correct order of Paleozoic periods from oldest on left to youngest on right? | Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, Permian |
Which of the following techniques is used to determine the absolute or actual age of a geological feature? | radiometric dating |