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The outer core of the Earth extends out to a little over halfway to the surface of the Earth. The volume of the core is
therefore about _________ the volume of the Earth.
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1/8
1/4
1/2
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Carbon 13 is a radioactive isotope. About half of a sample decays in 6000 years. After how long would only 1/8 of the
original carbon 13 be left?
6,000 years
12,000 years
18,000 years
24,000 years
30,000 years
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From the center outward, the correct order of the zones of the Earth is
Solid core, mantle, liquid core, crust, atmosphere.
Liquid core, solid core, crust, mantle, atmosphere.
Solid core, liquid core, mantle, crust, atmosphere.
Liquid core, solid core, mantle, crust, atmosphere.
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_________ and _________ are common in regions where subduction occurs.
Rifts; polarity shifts
Volcanoes; plate spreading
Auroras; the Coriolis effect
Mountains; earthquakes
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Analysis of volcanic emissions suggests that eruptions could be the source of all but which of the following gases in our
atmosphere?
Oxygen
Nitrogen
Water
Carbon dioxide
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Ozone
Is an element.
Is a molecule consisting of two oxygen atoms and a hydrogen atom.
Is a molecule consisting of three oxygen atoms.
Is a molecule consisting of two oxygen atoms and a nitrogen atom.
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The composition of the Earth's atmosphere today is about 78% _____, 21% _____, and much less than 1% _____.
Oxygen; nitrogen; carbon dioxide and other gases
Nitrogen; carbon dioxide; oxygen and other gases
Oxygen; carbon dioxide; nitrogen and other gases
Nitrogen; oxygen; carbon dioxide and other gases
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A rock has a density of 2 g/cm3. If another rock has twice as much mass but the same volume, its density must be
_____ g/cm3.
rev: 04_07_2014_QC_47893
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The most abundant element in the Earth's core is ___________.
Nitrogen
Oxygen
Hydrogen
Iron
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Density is calculated as
Mass times volume.
Mass divided by volume.
Volume divided by mass.
Mass times gravity.
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After an earthquake, an S-type seismic wave travels with a velocity of about 10 km/s and reaches another part of the
Earth in about 10 minutes. How far has the S-type wave traveled?
6000 km
1000 km
600 km
100 km
60 km
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The interior layer just below the crust of the Earth is called the _______.
Inner core
Outer core
Mantle
Troposphere
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The hotter inner core of the Earth is _______ and the relatively cooler outer core is ______.
Solid; also solid
Liquid; also liquid
Liquid; solid
Solid; liquid
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Why is the Earth's inner core solid?
Due to extremely high temperature.
Due to the tremendous pressure of overlying material.
Due to the spinning of the Earth.
The Earth formed by liquid material piling on top of a solid sphere.
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How is the age of a rock determined?
By determining the ratio of argon to potassium.
By counting the number of circles just like the circles on the trunk of a tree.
By measuring the temperature of the rock.
By measuring the amount of calcium it contains.
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What is the approximate age of the Earth?
6000 years.
1,000,000 years.
4.6 million years.
4.6 billion years.
13.7 billion years.
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The process in which two tectonic plates meet and one slips beneath another is called _____.
Convection
Pangea
Subduction
Rifting
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Van Allen belts exist in the Earth's ___________.
Troposphere
Core
Mantle
Magnetosphere
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In about 14,000 A.D., the North Pole of the Earth will point at star ________.
Polaris
Antares
Vega
Thuban
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The ___-type seismic waves can travel through liquids and solids. The ___-type seismic waves can travel through solids
only.
S; P
S; S
P; S
P; P
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