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Dynamic Earth Review
Dynamic Earth Review
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Review quiz for an 8th grade Earth Science Regents test in NYC, focusing on plate tectonics.
Flashcards
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Questions
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Answers
1
Beneath which surface location is Earth's crust thinnest?
middle of the North American plate
continental-continental convergent boundary
transform fault boundary
Mid-Atlantic Ridge (oceanic divergent boundary)
2
Density is
a measure of how compact or compressed matter is
a measure of how many atoms are in a space
a measure of mass per unit of volume
3
A quake epicenter is 3600km away. The P-wave arrives at 5:00:00. When does the S-wave arrive?
4:55:00
5:05:00
5:00:30
5:05:30
4
Which statement correctly compares P-waves with S-waves?
P-waves travel faster than S-waves & don't pass thru liquid
P-waves travel faster than S-waves & pass through liquid
P-waves travel slower than S-waves & don't pass thru liquid
P-waves travel slower than S-waves & pass through liquid
5
Collisions between oceanic plates and continental plates are thought to result primarily from
meteor impacts in the ocean basins
hot liquid magma in the inner core
volcanic eruptions along coastlines
convection currents in the mantle
6
Earth's outer core is inferred to be liquid based on the analysis of
crustal rocks
radioactive decay rates
magnetic pole reversals
seismic waves
7
Oceanic crust sinks beneath continental crust at a convergent boundary because
oceanic crust is denser than continental crust
oceanic crust is less dense than continental crust
oceanic crust is less massive than continental crust
oceanic crust is more massive than continental crust
8
At which location is the ocean crust oldest?
A
C
B
D
9
The epicenter of an earthquake is
the location where the tectonic plates shift
the spot on Earth's surface above where the quake occurs
the spot below Earth's surface where the quake occurs
the location where the S-waves are first detected
10
The following features are found at tectonic plate boundaries
volcanoes, mineral deposits, and meteors
mountains, earthquakes, and sedimentary rocks
earthquakes, volcanoes, and mountains
earthquakes, hot spots, and faults
11
As you move deeper into Earth, the density of Earth's materials
decreases, then increases
stays the same
increases
increases, then decreases
12
Which type of tectonic boundary is shown by the image below?
subvergent
divergent
transform
convergent
13
Which statement about the Earth's crust is best supported by the diagram?
The crust is composed of denser rock than the mantle is
The oceanic crust is thinner than the continental crust
The continental crust is composed mainly of sedimentary rock
The oceanic crust is thicker than the mantle
14
Which seismic info is needed to find the distance from an observer to an earthquake epicenter?
P-wave and S-wave refractions
depth of the earthquake focus
P-wave and S-wave arrival times
origin time of the earthquake
15
An S-wave reaches a seismic station 6000km away at 8:21:00. What time did the quake occur?
8:11:40
8:38:00
8:30:20
8:04:00
16
Epicenter of a quake is 5,000 km from a station. What is the difference in P & S travel time?
11 min 15 sec
5 min 20 sec
9 min 10 sec
6 min 40 sec
17
Basaltic rock that forms volcanic mtns. where mantle plumes reach Earth's surface is made of
coarse-grained, light colored felsic minerals
fine-grained, dark colored mafic minerals
coarse-grained, light colored mafic minerals
fine-grained, dark colored felsic minerals
18
How does temperature affect the density of a material?
as temperature increases, density stays the same
As temperature increases, density increases
As temperature increases, density decreases
as temperature decreases, density stays the same
19
In 7 minutes, a P-wave travels a total distance of
4,000 km
5,600 km
1,900 km
7,000 km
20
The epicenter of a quake is 8000km away. After how many minutes does the P-wave arrive?
11 min 20 sec
9 min 20 sec
17 min 0 sec
20 min 40 sed
