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- 1. Multiple Choice
How is the density of the Earth organized?
highest at the crust, lowest at the inner core
lowest at the crust, highest at the inner core
randomly
highest at the mantle, lowest at the inner core
- 2. Multiple Choice
Which has a lower density, the granitic continental crust or the basaltic oceanic crust?
granitic continental with a density of 2.7 g/cm3
granitic continental with a density of 3.0 g/cm3
basaltic continental with a density of 2.7 g/cm3
granitic continental with a density of 3.0 g/cm3
- 3. Multiple Choice
What is the Outer Core made of ?
Nickel and Copper
Iron and Copper
Iron and Nickel
Copper and Plastic
- 4. Multiple Choice
What is the density range of the Inner Core?
3.4 - 5.6 g/cm3
9.9 - 12.2 g/cm3
12.3 - 13.1 g/cm3
2.7 g/cm3
- 5. Multiple Choice
Which layers have a density higher than 7.0 g/cm3?
(Select more than one answer)
Crust
Stiffer Mantle
Outer Core
Inner Core
- 6. Multiple Choice
Use the top part of ESRT page 10 to answer.
In which layer of the earth are the arrows representing the convection currents shown?
Crust
Asthenosphere (Plastic Mantle)
Stiffer Mantle
Outer Core
- 7. Multiple Choice
Use the top and middle of ESRT page 10.
What is the approximate pressure at the boundary between the inner core and the outer core? (follow the dashed line)
4.0 million atmospheres
3.0 million atmospheres
2.0 million atmospheres
1.0 million atmospheres
- 8. Multiple Choice
The pressure at Earth's Crust is closest to which value...
4 milion atmospheres
2 million atmospheres
1 million atmospheres
0 million atmospheres
- 9. Multiple Choice
Use the lower chart on ESRT page 10.
What is the temperature at 3000 km depth?
3000 ºC
4000 ºC
5000 ºC
6000 ºC
- 10. Multiple Choice
Use the chart at the bottom of ESRT page 10.
At what depth is the temperature 2000 ºC ?
0 km
400 km
1000 km
5000 km
- 11. Multiple Choice
Use ESRT page 11 (Earthquake P & S Wave chart).
Which wave takes longer to travel (has a longer travel time)?
S-wave
P-wave
they take the same amount of time
it depends
- 12. Multiple Choice
What are the two waves an earthquake makes that are graphed on this ESRT page 11 diagram?
P-waves and S-waves
Epicenter and S-waves
Travel time and P-waves
Distance and Travel Time
- 13. Multiple Choice
If it took the S-wave 4 minutes to travel (travel time on y-axis), how far was the epicenter distance (x-axis)?
1 x 103 km
2 x 103 km
3 x 103 km
4 x 103 km
- 14. Multiple Choice
If it took the P-wave 4 minutes to travel (travel time on y-axis), how far was the epicenter distance (x-axis)?
1 x 103 km
2 x 103 km
3 x 103 km
4 x 103 km
- 15. Multiple Choice
A p-wave traveled for 3200 km to reach a seismic station. How long had it traveled for?
00:01:60
00:04:50
00:10:40
00:05:50
- 16. Multiple Choice
An earthquake occurs 6800 km from the seismic station which recorded the p and s-waves recordings. What was the time difference between the arrival times of the p and s-waves?
00:10:10
00:08:20
00:18:40
00:014:40
- 17. Multiple Choice
If the p-waves arrive at 03:22:43 and the s-waves arrive at 03:29:57, what is the time difference between their arrivals?
00:14:07
00:07:14
03:07:14
00:07:00
- 18. Multiple Choice
Which of the following sequences correctly lists the different arrivals of the waves from first to the last?
P waves → S waves → Surface waves
Surface waves → P waves → S waves
P waves → Surface waves → S waves
S waves → P waves → Surface waves
- 19. Multiple Choice
What is the useful information regarding the composition of the interior of the Earth can be derived from earthquake waves?
It changes radioactive decay rates of rocks.
It releases materials from within the Earth.
It travels through the Earth at a constant speed.
It travels at different rates through different materials.
- 20. Multiple Choice
Which of the following earthquake waves can travel through both solids and fluids?
P waves only
S waves only
Q-waves only
Both P and S waves
- 21. Multiple Choice
Which statement best explains why the P-wave of an earthquake arrives at a seismic station before the S-wave?
The S wave originates from the earthquake focus.
The P wave has a greater velocity than the S wave.
The P wave originates from the earthquake epicenter.
The S wave decreases in velocity as it passes through the liquid.
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