Geologic Time Question Preview (ID: 27235)
Basics Of Geologic Time Scale/Intro Game.
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A layer of marine fossils is discovered in a desert environment. Which hypothesis best explains the discovery?
a) The area was once covered by water.
b) Erosion turned most of the limestone in the area into sand.
c) A catastrophic event once occurred in the area.
d) Volcanic activity once occurred in the area.
The law of superposition is used for _______________ dating and radiometric dating is used for ______________.
a) relative; absolute
b) absolute; relative
c) relative; radioactive
d) radioactive; relative
How is radioactive decay used to date rocks?
a) Silly - rocks don't date. They aren't even alive. Minerals are exchanged though at wedding ceremonies!
b) Unstable elements break down at a predictable rate. By comparing the decayed to radioactive elements you can get the age.
c) Stable elements break down at a predictable rate. By comparing the decayed to radioactive elements you can get the age.
d) Isotopes of different compounds are compared
How would a biologist BEST determine the reason for extinction of a species?
a) read previous theories for connections
b) conduct experiments on carbon dating
c) use relative dating for each layer of rocks in a cross section
d) examine fossils of plants and animals in different rock layers to see how these organisms have changed
Absolute dating is when
a) radioactive decay is used to figure out the age of rocks
b) radioactive decay is used to get a comparison of the age of rocks
c) you absolutely have to date that new boy or girl in class
d) rocks that are older are found at the bottom and younger are found at the top
The law of superposition has to with the idea that
a) older rocks are found generally at the bottom and youngest at top
b) younger rocks are found at the top and youngest at the bottom
c) superman prefers to be positioned in the sky
d) Pangaea was when the continents were positioned together in one big super continent
Which of the following has the eras in order from oldest to current?
a) Cenozoic, Mesozoic, Paleozoic, Pre-Cambrian
b) Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic
c) Pre-Cambrian, Mesozoic, Paleozoic, Cenozoic
d) Cenozoic, Pre-Cambrian, Paleozoic, Mesozoic
The process by which the age of a rock is determined by measuring the amount of radioactive isotopes present in the rock or rock sample
a) Relative dating
b) Radioactive decay
c) Law of Superposition
d) Dating Your Cousin
Which era are we currently in?
a) Cenozoic
b) Mesozoic
c) Paleozoic
d) Pre-Cambrian
Which era was the Age of Dinosaurs/Reptiles?
a) Cenozoic
b) Mesozoic
c) Paleozoic
d) Pre-Cambrian
Which era was Age of Invertebrates?
a) Cenozoic
b) Mesozoic
c) Paleozoic
d) Pre-Cambrian
Earth is approximately ___________________ years old.
a) 4.6 billion
b) 46 billion
c) 4.6 million
d) 46 million
The geologic time scale is broken into __________ that are broken into ______________ that are broken into _______________.
a) periods; eons; eras
b) slices of bread, pieces of toast, PBJ
c) eons; eras; periods
d) eras; periods; eons
What's relative dating?
a) This is what happens in Arkansas when you date your cousins.
b) This is when you use radioactive materials found in rocks to figure out the age of the rock.
c) This relates to the idea that the oldest fossils are found on top of rock layers and the youngest are at the bottom.
d) This is when you use the comparative ages of rocks without using the absolute age.
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