Grade 8 Science
20. Students observe a partial graph of seismic data produced from an
earthquake. The graph shows data for two different layers in Earth
.
Seismic Wave
Velocity (km/sec)
2
4
6
8
10
12
S-Waves
P-Waves
P-Waves
Layer 1
Layer 2
The students create a table to identify which layers are shown in the
graph. Which table best represents the data in the graph?
Layer
Identification
Physical State
1
Outer Core
Liquid
M.
2
Inner Core
Liquid
Layer
Identification
Physical State
1
Mantle
Solid
P.
2
Outer Core
Liquid
Layer
Identification
Physical State
1
Crust
Solid
R.
2
Mantle
Solid
Layer
Identification
Physical State
1
Inner Core
Liquid
2
Crust
Solid
