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What is the relative age of a rock? What is your relative age (compare to a sibling)?
whether the rock is younger or older
What do scientists need to know in order to find the absolute age of a rock?
the relative age of the rock
Which method of radiometric dating was used to determine the age of the Earth?
the geologic time scale
The _______________________ states that the youngest rock layers are at the top of the oldest rock layers are at the bottom. This helps determine the ______________ of the ages of the rock.
law of superposition; absolute age
What is an unconformity? Give four examples.
erosion has caused an older rock layer to be exposed, and then a newer rock layer forms on top of it. examples: erosion, non-deposition, non-conformity and disconformity
The ______________________ shows how life has changed on Earth, as well as the major events in Earth's history?
geologic time scale
_____________________ describes the process of how living things on Earth have changed over long period of time.
What is the name of the large landmass (supercontinent) that existed more than 250 million years ago? ___________________________
What do scientists think may have caused dinosaurs to become extinct?
a meteorite hit earth and the climate changed
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