inside earth Ms. Millet
Terms
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- seismic wave
- a vibration that travels through earth carrying the energy relased by an earthquake
- inner core
- hottest layer made of iron and nickel., is liquid
- subduction
- is the prosses by which the ocean floor sinks beneath a deep-ocan trench and back into the mantle
- rift valley
- a deep valley
- geology
- the study of planet earth
- alfred wegener
- develped the theory continental drift--fossils he found on two diffrent continents, landform fit together like a puzzle
- plate
- a secton of the lithosphere that slowly moves over the asthenosphere carrying pieces of continental and oceanic crust
- sea-floor spreading
- the prosses that continually adds new material to the ocean floor
- the crust
- is earth solid and rocky outer layer including the land surface and the ocean floor,coldest layer, thinnest layer
- scientific theory
- is a well-tested concept that explains a wide range of observations
- convetion current
- the movement of a fluid caused by different tempertures that transfer heat from one part of the fluid to another
- granite
- a light colored rock that is found in continental crust
- pangaea
- a landmass that broke apart two hundred million years ago and gave rise to todays continents(supercontinent)
- convergent boundary
- a plate where two plate move toward each other
- mid-ocean ridge
- the longest change of moutains in the world
- deep-ocean trenches
- the ocean floor plunges into deep under-water canyons
- density
- the amount of mass in a given space mass per unit volume
- destructive forces
- are thoses that slowly wear away moutains and other feature surfaces
- geologist
- a person who studies the forces that shape and form planet earth
- asthenosphere
- the soft of the mantle on which the lithosphere floats
- fossil
- a trace of an ancient organisim that has been preserved in roc
- lithosphere
- ridge layer made up of the upper most part of the mantle and the crust
- divergent boundary
- the place where two plates move apart or diverge
- constructive force
- shaped the surface by building up moutatins and landmasses
- seismograph
- Instrument used to measure seismic waves
- basalt
- a dark dense fine texture found in oceanic crust
- plate tectonics
- the geologic theory that states that pieces of earth's lithosphere mantle
- convection
- the transfer of heat by movement of a heated fluid
- outer core
- made of iron and nickel
- sonar
- a device that determines the distacve of an object under water by recording ecohs of sound waves
- faults
- breaks in the earths crust where rocks have slipped past each other
- continent
- a great landmass, surroundee by oceans
- continental drift
- the hypothesis that the continents slowly moved across earths surfaces
- mantle
- 2nd layer, it is the thickest layer 2900km, hot
- harry hess
- developed the theory sea-floor spreading- ocean floors move like conveyor belts, carrying the continents along with them
- transform boundary
- is a place where two plates slip past each other moving in oppostie directions
- j. turzo Wilson
- developed the theory of plate tectonics - earths lithosphere are in constant slow motion, driven by convection currents in the mantle