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Dynamic Earth Flashcards | StudBud
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Dynamic Earth
Dynamic Earth
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1
What forms at a convergent boundary?
Mountain
Trench
Mid-Ocean ridge
Volcano
2
How do scientists explain the formation of underwater mountain ranges?
Sea floorspreading
Continental drift
Strike-slip (transform boundaries)
Convection currents
3
Which type of crust is more dense?
The Core
Continent
Ocean
Magnetosphere
4
What evidence supports our understanding of seafloor spreading?
The rocks on the ocean floor are all the same age.
Older rocks are near ridges on the ocean floor.
Younger rocks are near ridges on the ocean floor.
The rocks on the continental crust get older near a valley.
5
How much greater is the magnitude 5 earthquake than a 2 earthquake?
100 times bigger
300 times bigger
3 times bigger
1000 times bigger
6
Which of the following is considered a result of the movement of tectonic plates?
Earthquakes
Increased volcanic activity
Mountain Ranges
All of the above
7
Identical rock types and fossils are found on different continents. Why?
Come rock types are very common and are found everywhere.
These continents were joined together at one time.
The same forces erode mountains in different locations.
Organisms traveled between these continents on land bridges.
8
What is the feature labeled “A” in the diagram to the right?
The epicenter
The focus
The plate boundary
The dip
9
Which of the following shows a normal fault?
B
D
C
A
10
When two plates move toward each other, you are at a-
Convergent plate boundary
Volcano
Divergent plate boundary
Transform plate boundary
11
What is the minimum number of seismograph stations needed to locate the epicenter?
1
2
3
4
12
Most earthquakes occur near...
The middle of a plate.
On top of mountains.
Plate boundaries
The core
13
Magma rises to the top of the mantle, cools, then sinks, and repeats the cycle.This is called
Advection forces
Convection currents
Hot spots
Magnetic fields
14
Where is old, dense ocean crust melted?
Hot spot
Subduction zone
Fault
Mid-ocean ridge
15
Using the picture below, which of the following is the hanging wall?
Wall A
Wall B
16
On a seismograph, the closer the P and S waves arrival times...
The closer the seismograph is to thefocus.
The closer the seismograph is to the epicenter
The farther the seismograph is to the epicenter
The farther the seismograph is to the focus.
17
Younger oceanic crust is
Farthest from the mid-ocean ridge
In the middle of the continental crust
Near the mid-ocean ridge
Along continental crust
18
The folding found in the rocks of the Appalachian mountains are a result of
The Coriollis effect
Heating and cooling of the prehistoric atmosphere
Wave action of prehistoric oceans
Collisions of continental plates
19
What is a hot spot?
Where hot mantle rises through the crust, creating a volcano
Where a volcano used to be
Where an earthquake is occurring
Where convecting material circles back down into the core
20
Scientists use earthquake and volcano activity to establish
Borders between countries
The density of rock layers
Plate boundaries
Lines of latitude
21
Who developed the procedure used to measure the size of an earthquake?
James Hutton
Charles Richter
Henri Darcy
Charles Darwin
22
Which of the following types of seismic waves arrives at a seismograph first?
All of the waves arrive at the same time
Surface-waves
P-waves
S-waves
23
When two plates slide past each other, it is referred to as-
Volcano
Transform plate boundary
Divergent plate boundary
Convergent plate boundary
24
When the sea floor spreads apart, volcanoes and ridges are formed because
Underwater earthquakes lift the sea floor intoridges
Sediments are deposited where the floor spreads.
Ocean water pushes down on the sea floor, pushing up ridges
Plates pull apart, magma moves to surface, forming ridges.
25
The crust and the upper mantle together are called the ___________.
Core
Crust
Mantle
Lithosphere
26
Which of the following shows a reserve fault?
B
D
A
C
27
How much greater is the magnitude 8 earthquake than a 6 earthquake?
200 times bigger
2 times bigger
100 times bigger
10 times bigger
28
What happens to the ocean crust when it collides with continental crust?
Because it’s less dense, it just bounces back
Because it’s more dense, it rises above thecontinental crust
Because it’s more dense, it subducts under the less dense
Because it’s less dense, it subducts under the more dense
29
S-waves…
Can travel through both liquid and solid
Are the waves that cause tsunamis
Can only travel through solid
Can only travel through liquid
