How can we help?

You can also find more resources in our Help Center.

31 terms

Chapter 5 Plate Tectonics

STUDY
PLAY
seismic waves
waves that produce when earthquakes occur
prssure
results from a force pressing on an area
crust
the layer of rock that forms Earth's outer skin
basalt
a dark rock with a fine texture
granite
usually a light colored rock with a course texture
mantle
a layer of hot, solid rock that is about 40 kilometers beneath the surface
lithosphere
the uppermost part of the mantle and the crust that is rigid
asthenosphere
a soft layer of earth that is solid, but bendable
outer core
a layer of molten metal that surrounds the inner core
inner core
a dense ball of solid metal
radiation
The transfer of energy through space
conduction
heat transfer within a material or between materials that are touching
convection
heat transfer by the movement of currents within a fluid
density
a mesure of how much mass there is in a volumeof a substance
convection current
the flow that transfers heat within a fluid
continental drift
Alfred Wegener's theory that the continents slowlymoved over Earth's surface
Pangaea
According to alfred, the continents drifted together to form this supercontinent
fossil
any trace of an ancient organism that has been preserved in rock
mid-ocean ridge
they wind beneath earth's oceans
sonar
a device that bounces sound wavesoff underwater objects and then records the echoesof these sound waves
sea- floor spreading
the sea floor spreads along both sides of the mid-ocean ridge as new crust is added
deep-ocean trench
the oceanic crust bends downward
subduction
the process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle
plate
according to J. Tuzo Wilson, the lithosphere is broken into sections called plates
scientific theory
a well tested concept that explains a wide range of observations
plate tectonics
this states that pieces of Earth's lithosphere are in slow, constant motion
fault
breaks in eath's crust where rocks have slipped past eachother
divergent boundary
the place where two plates move apart
rift valley
forms along the divergent boundary
convergent boundary
the place where two plates come together
transform boundary
a place where two plates slip past eachother