Attempt Score 98 /100 - 98 %
Overall Grade (Highest Attempt) 98 /100 - 98 %
Question 1 2/ 2 points
The Precambrian Era is the time before abundant multicellular life with hard parts evolved. This time
interval represents what percentage of earth's history?
) 88%
12%
50%
1%
99%
Question 2 2/ 2 points
Which best explains the processes at the mid-oceanic ridge?
o Plates diverge creating new crust
Plates slide past each other destroying old crust
Question 3 2/ 2 points
What information is needed to determine the distance from the epicenter of an earthquake to a seismic
receiving station?
The difference between the amplitude of the seismic waves
The transverse nature of the s-wave
The amplitude of the seismic waves on a seismogram
o) The time interval between the P and S waves
The magnitude of the earthquake
Question 4 2/ 2 points
When the radiometric clock starts ticking in zircon minerals, there is only 100% of the unstable radiometric
parent isotope X and 0% of the stable daughter isotope Y. After testing in a lab millions of years later, there
is 25% of the parent radiometric isotope and 75% of the daughter isotope. How many half lives have
elapsed?
0.25
3
05
2
1
, Question 5 2/ 2 points
Applying the principles of relative age-dating to the diagram, which of the following is TRUE.
Explanation of the diagram:
"A" represents an unconformity (erosional surface),
is a basaltic dike,
"C"is a shale formation,
"D" is a sandstone formation,
"E" is a limestone formation,
"F" represents a thrust fault.
Ais YOUNGER than C
Fis YOUNGER than A
o) Eis OLDER than B
B is OLDER than F
D is YOUNGER than C
Overall Grade (Highest Attempt) 98 /100 - 98 %
Question 1 2/ 2 points
The Precambrian Era is the time before abundant multicellular life with hard parts evolved. This time
interval represents what percentage of earth's history?
) 88%
12%
50%
1%
99%
Question 2 2/ 2 points
Which best explains the processes at the mid-oceanic ridge?
o Plates diverge creating new crust
Plates slide past each other destroying old crust
Question 3 2/ 2 points
What information is needed to determine the distance from the epicenter of an earthquake to a seismic
receiving station?
The difference between the amplitude of the seismic waves
The transverse nature of the s-wave
The amplitude of the seismic waves on a seismogram
o) The time interval between the P and S waves
The magnitude of the earthquake
Question 4 2/ 2 points
When the radiometric clock starts ticking in zircon minerals, there is only 100% of the unstable radiometric
parent isotope X and 0% of the stable daughter isotope Y. After testing in a lab millions of years later, there
is 25% of the parent radiometric isotope and 75% of the daughter isotope. How many half lives have
elapsed?
0.25
3
05
2
1
, Question 5 2/ 2 points
Applying the principles of relative age-dating to the diagram, which of the following is TRUE.
Explanation of the diagram:
"A" represents an unconformity (erosional surface),
is a basaltic dike,
"C"is a shale formation,
"D" is a sandstone formation,
"E" is a limestone formation,
"F" represents a thrust fault.
Ais YOUNGER than C
Fis YOUNGER than A
o) Eis OLDER than B
B is OLDER than F
D is YOUNGER than C
