GEOL 1110 Exam 1 Questions
with 100% Correct Detailed
Answers
principle of cross-cutting relationships - Answer- igneous intrusions and fault lines that
cut through older rocks
unconformity - Answer- older rocks were weathered and eroded before new rocks are
deposited on top
Correlation - Answer- matching rock layers from one place to another
Index fossil - Answer- lived in many places, common/ easy to find, existed for a short
time/ changed rapidly
isotope - Answer- two atoms with the same number of protons, are the same chemical
element
carbon-12 - Answer- most common form of carbon that we have
carbon-13 - Answer- has one more neutron than protons, chemically operates the same
way as carbon-12
carbon-14 - Answer- a radioactive isotope of carbon
radioactive isotope - Answer- An isotope whose nucleus decays spontaneously, giving
off particles and energy.
radioactive decay - Answer- The breakdown of a radioactive element, releasing
particles and energy
rate of decay - Answer- half-life, the time it takes for half of the parent isotope to decay
into the daughter isotope
radiometric dating - Answer- the process of measuring the absolute age of geologic
material by measuring the concentrations of radioactive isotopes and their decay
products
sedimentary rock - Answer- most common rock on the earth's surface
ripples - Answer- back and forth movement of waves produces these structures
with 100% Correct Detailed
Answers
principle of cross-cutting relationships - Answer- igneous intrusions and fault lines that
cut through older rocks
unconformity - Answer- older rocks were weathered and eroded before new rocks are
deposited on top
Correlation - Answer- matching rock layers from one place to another
Index fossil - Answer- lived in many places, common/ easy to find, existed for a short
time/ changed rapidly
isotope - Answer- two atoms with the same number of protons, are the same chemical
element
carbon-12 - Answer- most common form of carbon that we have
carbon-13 - Answer- has one more neutron than protons, chemically operates the same
way as carbon-12
carbon-14 - Answer- a radioactive isotope of carbon
radioactive isotope - Answer- An isotope whose nucleus decays spontaneously, giving
off particles and energy.
radioactive decay - Answer- The breakdown of a radioactive element, releasing
particles and energy
rate of decay - Answer- half-life, the time it takes for half of the parent isotope to decay
into the daughter isotope
radiometric dating - Answer- the process of measuring the absolute age of geologic
material by measuring the concentrations of radioactive isotopes and their decay
products
sedimentary rock - Answer- most common rock on the earth's surface
ripples - Answer- back and forth movement of waves produces these structures
