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Theory of Plate Tectonics Honors
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Theory of Plate Tectonics
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1
Alfred Wegener is known for hypothesizing the __________ Theory in 1912.
Continental Drift
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2
Wegener believed that all continents were once joined together to create a supercontinent called __________.
Pangea
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3
The reasoning that similar __________ on different continents indicates movement after they formed is part of Wegener's evidence.
climates
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4
Fossils of the same species found in the same-aged rocks on continents separated by oceans support the __________.
Continental Drift Theory
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5
The movement of plates is due to __________ in the mantle.
convection
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6
The theory of Plate Tectonics was informed by Dr. Harry Hess’s discovery of __________ in the 1960s.
seafloor spreading
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7
Wegener's Continental Drift Theory was later denounced because he could not explain how the continents __________.
moved
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8
Evidence of __________ deposits from ancient glaciers in warm climates supports the Continental Drift Theory.
rock
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9
The __________ states that Earth’s lithosphere is broken into tectonic plates.
Theory of Plate Tectonics
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10
Magma that rises and pushes plates apart is part of the __________ process.
ridge push
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11
In the Theory of Plate Tectonics, __________ pull refers to the sinking of cooler magma back towards the mantle.
slab
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12
Hess determined that the __________ rock is located at the mid-ocean ridge.
youngest
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13
The magnetic field reverses every __________ years, affecting the polarity of minerals in new rocks.
200,000-300,000
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14
Similar rocks and mountain structures found in different continents suggest they were once a single __________.
mountain range
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15
Glacial grooves in areas close to the __________ support Wegener’s theory.
equator
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16
Seeds of certain plants are too heavy to be carried by __________, indicating continental connections.
wind
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17
The lithosphere is the outer shell of the Earth made up of __________ plates.
tectonic
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18
When the continents drifted apart, Wegener believed the organisms could not survive due to __________ barriers.
oceanic
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19
Hess's radar observations during WWII led to the discovery of __________.
mid-ocean ridges
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20
The __________ indicates that different regions of Earth had similar ancient climates.
Continental Drift Theory
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21
The concept of plate movement includes factors like ridge push and __________.
slab pull
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22
In the 1960s, Dr. Harry Hess' research on seafloor spreading contributed to the evolution of the __________.
Plate Tectonics theory
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23
Wegener's reasoning for similar fossils includes that organisms lived when the continents were __________ together.
joined
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24
The term __________ means 'all the earth' and refers to Wegener's supercontinent idea.
Pangea
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25
The ancient __________ and coal deposits found in colder regions suggest prior warmer climates.
coral reefs
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26
The __________ Theory acts as a framework for understanding the movements of Earth’s lithospheric plates.
Theory of Plate Tectonics
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27
Ridge push involves magma rising from the lower mantle, while slab pull involves __________ sinking back to the mantle.
cooler magma
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28
The continents drift due to processes such as mantle convection, ridge push, and __________ pull.
slab
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29
The evidence of fossils across continents implies that species once inhabited a larger, __________ landmass.
unified
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30
Glacial remnants found in tropical areas suggest that __________ has shifted significantly over time.
climate
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31
The existence of parallel mountain ranges across continents indicates that they were once part of a single __________.
structure
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32
In terms of geological evidence, the theory of plate tectonics relies on data from __________.
magnetism
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33
The theory posits that tectonic plates move very __________ over time.
slowly
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34
Continents fitting together like a __________ was an early piece of evidence for the Continental Drift Theory.
puzzle
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35
The study of lithosphere plates is crucial to understanding the __________ of Earth.
structure
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36
Wegener's theory was a stepping stone to the modern understanding of __________.
plate tectonics
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37
Fossils found on opposite continents indicate they were once __________ connected.
physically
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38
Seafloor spreading results in the creation of new __________ crust.
oceanic
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39
Wegener used geological and fossil evidence to support his __________.
theory
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40
The term __________ refers to ancient climates found on continents that differ from their present conditions.
paleoclimate
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41
The alternating locations of magnetic poles reflect the __________ of Earth's magnetic field.
reversals
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42
The movement and distribution of minerals and rocks helps support the __________ of plate tectonics.
theory
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43
Hess's contribution to geology involved monitoring the ocean floor to discover patterns of __________.
magnetic reversal
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44
Ridge push occurs when hotter __________ rises, pushing tectonic plates apart.
magma
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45
The matching geological features across continents support the theory of __________.
continental drift
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