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16 Cards in this Set
- Front
- Back
Oceanography |
The story of the ocean. |
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Solar Nebula |
(Thin cloud) earth and its ocean formed as an indirect result of a supernova explosion from which our sun and its planets formed. was probably struck by the shock wave and some matter of an expanding supernova remnant. |
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Density |
Is an expression of the relative heaviness of a substance. It is defined as the mass per unit volume, usually expressed as grams per cubic centimeters. |
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Latitude |
Lines drawn parallel to the equator. |
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Longitude |
Lines running from pole to pole. |
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Crust |
The outermost solid layer of earth. Composed mostly of granite and basalt. The top of the lithosphere. |
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Core |
The innermost layer of earth. Composed primarily of iron, with nickel and heavy elements. The inner core is thought to be a solid 11,000 F sphere, the outer core is a 9,000F liquid mass. |
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Mantle |
The layer of earth between the crust and the core. Composed of silicates of iron and magnesium. The mantle has an average density of about 4.5 g/cm3 and accounts for about 68% of the earth's mass. |
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Lithosphere |
The brittle, relatively cool outer layer of Earth. Consisting of the oceanic and continental crust and the outermost rigid layer of the mantle. |
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Mesosphere |
The rigid inner mantle similar in chemical composition to the asthenosphere. |
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Asthenosphere |
The hot plastic layer of the upper mantle below the lithosphere, extending some 350-650 kilometers (220-400 miles) below the surface. Convection currents within the asthenosphere power plate tectonics. |
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Outer core |
A fluid layer about 2,300 km (1,400 miles) thick and composed mostly of iron and nickel that lies above Earth's solid inner core and below its mantle. |
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Equator |
0 latitude, an imaginary line equidistant from the geographical poles. |
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Equator |
0 latitude, an imaginary line equidistant from the geographical poles. |
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Inner core |
Earth's innermost part, believed to be primarily a solid ball with a radius of about 1220 km or 768 miles. Composed of iron-nickel alloy and some light elements. Temperatures at the inner core is approximately 570" kelvin. |
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Prime Meridian |
A line of longitude in a geographical coordinate system at which longitude is defined as 0. Together a prime meridian and its anti-meridian form a great circle. This great circle divides the sphere, e.g. The earth into two hemispheres. |