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chapter 3 science
dynamic earth
| Question | Answer |
|---|---|
| mesosphere | layer above stratosphere, coldest layer of the atmosphere, lower layer of mantle |
| outer core | outer shell of the earth's core, made of liquid nickel and iron |
| lithosphere | outermost layer of the earth, consists of crust & upermost part of mantle, divided into tectonic plates |
| asthenosphere | solid plastic layer of the mantle between meso&lithosphere, made of mantle rock which flows slowly resulting in the movement of tectonic plates |
| inner core | center of the earth, solid nickel and iron |
| geologists | studying the physical structure and processes of the Earth |
| fault | a break in the earth's crust along which blocks of the crust slide relative to one another |
| granite | igneous rock in the crust of the earth |
| basalt | volcanic rock found on earth's surface |
| subduction | two tectonic plates meet and move towards one another, with one sliding underneath the other and moving down into the mantle |
| plates | lithosphere is divided into tectonic plates which glide along asthenoshpere |
| Seismic wave | waves that travel through earth's interior during eathquake |
| radiation | transfer of energy across space and in the atmoshpere |
| convection | transfer of heat by air currents |
| conduction | the flow of heat from a warmer object to a colder object when the objects are placed in direct physical contact |
| focus | the earthquake's underground point of origin |
| epicenter | is the point on the Earth's surface that is directly above the point where an earthquake or other underground explosion originates or focus |
| Pressure wave | wave produced by earthquakes |
| density formula | D=M/V |