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| We depend on geologists for the raw materials we need for survival. |
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| A tsunami has a small wave height, travels rapidly, and is not noticed by people in boats. |
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| While the reserves of petroleum hydrocarbons within the United States are limited, other geologic resources (iron, aluminum, copper, and tin) are available in great abundance. |
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| Geology uses the scientific method to explain natural aspects of the Earth. |
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| Ocean - ocean plate convergence formed major mountain belts such as the Andes and Cascades. |
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| The mantle is the most voluminous of Earth's three major concentric zones. |
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| Earth's lithosphere is made up of the uppermost part of the mantle and crust. |
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| Most convergent plate boundaries coincide with the crests of submarine mountain ranges called mid-oceanic ridges. |
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| Plate tectonics regards the lithosphere as divided into segments (plates) that are in horizontal motion. |
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| A transform plate boundary occurs where two plates converge. |
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| Convergent boundaries, due to their geometry, are the sites of the largest earthquakes on Earth. |
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| Rocks brought to the earth's surface by internal processes are worn down, and eroded by surficial processes. |
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| The Earth is about 4.6 billion years old. |
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| The Earth can be considered as interrelated systems.. |
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| The Earth's system that includes the oceans, rivers, lakes, and glaciers of the world is called the _______. |
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| The _____ is an example of a transform plate boundary. |
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| San Andreas Fault of California |
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| Rock deep within the Earth is _____ and ______. |
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| hot; heat flows out toward Earth's surface |
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| Earth's external heat engine is driven by __. |
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| The Earth's interior heat engine works because hot buoyant material deep within the Earth _______ while cold denser material _______. |
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| moves upward; moves downward |
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| Listed from Earth's center outward, the three concentric zones of Earth are the __. |
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| A _____ is a scientific concept that has been tested and is in all likelihood true. |
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| _______ are geological forces generated inside the Earth |
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| _______ are geological forces generated inside the Earth |
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| Earthquakes, volcanic eruptions, landslides, floods, and tsunamis are all examples of: |
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| The ____ is soft and therefore flows more readily than the underlying mantle |
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| After data have been analyzed, tentative explanations or solutions called _____ may be proposed. |
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| Plate tectonics is a unifying idea that helps explain where and why there are ___ on Earth. |
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| The two major types of crust are oceanic crust and __. |
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| The concept of plate tectonics regards the earth's ___ as broken into a number of ___ that are in motion relative to each other. |
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| Plates are known to be moving away from each other __. |
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| A _______ boundary occurs where plates move towards one another. |
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| The _____ of old seafloor takes place at convergent boundaries. |
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| The North American plate is moving ____. |
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| The best geologic data currently available indicates that Earth is approximately ___ years old. |
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