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24 Cards in this Set
- Front
- Back
1. How have geologists learned about earth’s inner structure?
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direct evidence from rock samples and indirect evidence form seismic waves
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2. What are the characteristics of Earth’s crust?
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5-70km; earth's outer skin made of soild rock ( basalt- oceanic and granite - cntinental) includes ocean floor and dry land
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3. What are the characteristics of Earth’s mantle?
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3000 km;very hot but soild, 3 layers: lithosphere, asthemosphere,and lower mantle
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4.What are the characteristics of Earth’s core
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2 layers : outer molten iron and nickel,2000 km and the inner soild iron and nickel 1500km
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5. How do seismic waves reveal the structure of the earth?
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the speed of the waves and paths they take reveal clues about earths ineer structure
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6 What happens with pressure and temperature the closer you get to the center of the earth?
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the deeper into the earth you go the more pressure and fpr every 40m the temp goes up 1 degree C
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7 _____ vibrations hat travel through Earth carrying the energy released during an earthquake
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seismic
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8_______ the force exerted on a surface divided by the total area over which the force exerted
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pressure
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9______ the layer of rock that forms earths outer surface
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crust
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10_______ a dark dense ignoues rock with a fine texture found in oceanic crust
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basalt
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11 _________a usually light colored igneous rock that is found in continetital crust
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granite
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12______the layer of hot soild material b/n earth's crust and crust and core
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mantle
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13____a rigid layer made uo of the upper most part of the mantle and crust
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lithosphere
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14_____ the soft layer of the mantle on which the lithosphere floats
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asthenosphere
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15_____ a layer of molten iron and nickel that surrounds the inner core of earth
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outter core
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16______ a dense sphere of soild iron and nickel at the center of earth
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inner core
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17 How is heat transferred?
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heat ia transfered by radiation conduction and convection
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18. What causes convection currents?
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movement fluids changes in the fluids denisty force of gravity
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19. What causes convection currents in Earth’s Mantle?
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heat from the core and the mantle
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20_____ transfer of energy through space
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radiation
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21____ transfer w/in a material or b/n materials that are touching
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conduction
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22____ transfered by the movement of fluids; occurs in currents
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convection
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23_____ a measure of how much mass there is in a volume of a substance
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density
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24_____ the flow that transfer heat within a fluid
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convection current
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