Rocks have layers
This is a break in the rock layers, usually where earthquakes occur
What is a fault?
This is the largest unit of time on the Geologic Time Scale
This is the stretching of light waves due to the expansion of the universe
What is redshift?
The amount of time it takes for half of the original radioactive material to decay
What is half-life?
This parent isotope is the most useful dating metamorphic rocks
What is Rubidium-87?
This is the gap in the rock record, usually as a result of weathering and erosion
What is an unconformity?
We use this type of dating to figure out the exact age of a rock or fossil
What is radiometric dating?
These are the two most abundant elements in the universe that came from the Big Bang
What are hydrogen and helium?
This is the percentage of the amount of the radioactive isotope you have left after one half life has gone by
What is 50%?
This is the Epoch where the earliest dinosaurs began
What is the middle Triassic?
This law states that in an undisturbed sequence of sedimentary rock layers, the oldest is always on the bottom and the youngest is at the top
What is the Law of Superposition?
This is using the remains of past creatures to figure out the relative date of layers of rock.
What is the fossil record?
This is the process of creating atomic nuclei
What is nuclosynthesis?
What is 3 half lives?
This parent isotope would be the most useful if an element is 200,000 years old
What is Potassium-40?
This is the law where the rock inside of the layer of rock is younger than the rock around it
What is the law of inclusions?
This is the most useful remains of a creature to determine the relative date of rock layers
What are Index Fossils?
This was the evidence that proved that light elements came from the Big Bang
What is Cosmic Microwave Background Radiation (CMB)?
This radioactive element is the most common one to use, especially for things that used to be living
What is Carbon-14?
This is the time period where peak triolobite diversity occured
What is cambrian?
This is an event where lava must have melted into the other rock layer to create an unconformity in the rock record
What is an intrusion?
The oldest rocks in New York State are found in this region
What is the Anirondack Mountains?
This is the law that states the farther a galaxy is, the faster it appeard to be moving away
What is Hubble's Law?
This is the name of the decay product of all parent isotopes
What is the daughter decay product?
These are the periods when the advance and retreat of the continental ice occured
What is quanternary and neogene?