Earths Interior
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| High _____ is usually an indication of a magma body or still-cooling pluton near the surface. | heat flow
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| Heat flow ______ the crest of the mid-oceanic ridges. | decreases away from
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| Detailed images provided by _____ suggest that the mantle is heterogeneous, probably due to variations in temperature, composition, and density. | seismic reflection
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| What is the asthenosphere? | It is the zone of weakness in the mantle on which the lithosphere moves.
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| ___ indicates that the core of the Earth is a liquid | The S-wave shadow zone
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| _______ is a balance or equilibrium of adjacent blocks of brittle crust floating on the upper mantle. | Isostasy
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| The rock record for tens of millions of years indicates that the Earth's magnetic field ____. | reverses polarity about every 500,000 years
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| Seismic P-waves _____ through continental crust relative to oceanic crust. | travel slower
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| The rise of the crust after removal of ice is called ____. | crustal rebound
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| Continental crust is ___ relative to oceanic crust | thicker
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| Because _____ can be accurately calculated, the size and shape of the core can be determined. | P-wave paths
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| The boundary that separates the crust from the mantle is the ____. | Mohorovicic discontinuity
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| The study of ancient magnetic fields is called ____. | paleomagnetism
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| One widely accepted hypothesis is that the Earth's magnetic field is created by electric currents within the ______. | liquid outer core
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| A region of magnetic force, called the ______ surround Earth. | magnetic field
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| A cavity or body of low-density material causes a _____ pull on a gravity meter relative to average crust. | weaker
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| The gradual loss of heat through the Earth's surface is called ___. | heat flow
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| The P-wave shadow zone can be explained by the refraction of P-waves at the ___. | core-mantle boundary
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| A deviation from average reading is called a(n) ____. | anomaly
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| The bending of seismic waves as they pass from one material to another is called seismic ____. | refraction
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| The upper mantle consists of _______. | ultramafic rocks
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| _____ predicts that the higher a mountain range extends above sea level the deeper it extends into the mantle. | Isostatic adjustment
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| A ____ is a tool used to study the gravitational attraction between Earth and a mass within the instrument. | gravity meter
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| A gravity meter registers _____ over ore bodies. | increased gravity
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| Hot mantle rock rising slowly by convection under parts of the ocean explains ____. | the unexpectedly high heat flow under the oceans
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| The ____ is the transition zone at the core-mantle boundary. | D layer
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| The boundary between the core and the mantle is marked by great changes in ____. | Seismic velocity, density, and temperature are all correct.
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| As lava cools below the _____ point, a record of the Earth's magnetic field is permanently trapped in the rock. | Curie
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| _____ is the branch of geology that applies physical laws and principles to study Earth. | Geophysics
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| Iron-nickel meteorites are an important source of information regarding the composition of Earth's ______. | core
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| _____ is a circulation pattern in which low-density material rises and high-density material sinks. | Convection
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| The ____ is a low velocity seismic zone. | asthenosphere
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Created by:
Thomas.Siu
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