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24 Cards in this Set

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