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Ch.17 plate tectonics study guide Flashcards | StudBud
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Ch.17 plate tectonics study guide
Ch.17 plate tectonics study guide
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1
Where are most divergent boundaries found
On continents
On the seafloor
Along coastlines
At subduction zones
2
The Mid- Atlantic Ridge is an example of a
Divergent boundary
Subduction zone
Transform boundary
Convergent boundary
3
Which of the following best describes what happens when an oceanic plate coverages with a continental plate ?
Both plates crumple and a folded mountain range forms
A trench and a mountain range with many volcanoes can form
A deep-sea trench and an island arc form
Both plays become fractured, and a series of long faults
4
Which of the following landforms results from divergence of continental crust ?
A mountain range
A Rift Valley
A deep-sea trench
A long fault
5
At which tectonic plate boundary do plates slide horizontally past each other ?
Divergent boundary
Oceanic- Oceanic boundary
Continental-continental boundary
Transform boundary
6
Based on observations of fossils of Glossopteris, Wegener concluded that
Glossopteris grew only in the tropics
Magnetic reversals had occurred in Earth’s past
Earth’s continents were never joined
Continental rocks containing these fossils had once been joined
7
Tectonic plates interact at places called plate
Boundaries
Regions
Subductions
Reversals
8
Most scientists at the time rejected Wegener’s hypothesis of continental drift because he
Couldn’t explain how or why the continents moved
Had collected little evidence to support his hypothesis
Insisted that Earth’s axis of rotation had changed
Would not state his hypothesis publicly
9
What happens along a divergent boundary on the seafloor
Oceanic plates are subducted into the mantle
Continental mountain ranges form
New ocean crust forms
Ocean basins become smaller
10
Places where tectonic plates come together are called
Rift valleys
Divergent boundaries
Transform boundaries
Convergent boundaries
11
Which feature is associated with a continental- continental plate boundary ?
A subduction zone
A mountain range
A deep-sea trench
A volcano
12
Based on the glacial deposits he observed, Wegener argued that
Glossopteris could not survive hot weather
Glaciers form near the equator
Landmasses drifted away from the South Pole
Earth’s axis of rotation had changed in the past
13
Pangaea was an ancient supercontinent made up of
South Africa, India, Australia and South America
All earths continents
Antarctica, India, and South America
The United States, Greenland, and Europe
14
Fossil evidence that supported Wegener’s idea of continental drift included
Ocean plants
Ocean mammals
Land-dwelling animals
Tropical flowers
15
Which of the followers nah features forms when two oceanic plates converge ?
Rift valleys
Subduction zone
Magnetic reversal patterns
Divergent boundaries
16
Fossils of aquatic reptiles found in freshwater rocks suggested to Wegener that these reptiles
Once lived in Earth’s oceans
Probably did not cross the oceans
Ate Glossopteris
Swam the great distances between continents
17
To support his hypothesis of continental drift, Alfred Werner did NOT use
Evidence from rock formations
Date on ancient reptiles and ferns
Ancient climatic evidence
Magnetic field data
18
Which of the following is NOT associated with transform boundaries?
Long faults
Deformed and fractured crust
Volcanoes
Shallow earthquakes
19
Coal beds in Antarctica indicated to Wegener that this continent was
Once beneath the ocean
Once located closer to the equator
Inhabited by penguins
Always cold
20
Places where tectonic plates move apart are called
Subduction zone
Divergent boundaries
Transform boundaries
Convergent boundaries
21
Oceanic crust is made mostly of
Basalt
Granite
Sediments
Water
22
Early mapmakers thought continents might have moved based on their observations of
Rock and fossil evidence
Matching coastlines
Magnetism
Earthquakes and floods
23
Convergent boundaries are classified according to the
Type of crust involved
Rate at which the plates collide
Compass direction of movement of the plates
Type of fossils found at the boundaries
24
What can happen when two oceanic plates converge and one is subducted into the mantle ?
The lithosphere splits to create a divergent plate boundary on land
Magma erupts and forms an arc of islands
A continent splits to form a new ocean basin
The colliding plates edges become crumpled to form a mountain range
25
Which theory states that Earth’s crust and rigid upper mantle move in different directions and at different rates
Seafloor spreading
Ridge push and slab pull
Plate tectonics
Continental drift