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History
World War II Terms
62
History
6th Grade
05/26/2009

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Term
embargo
Definition
a restriction of trade
Term
theater of war
Definition
the main areas the war was fought in
Term
veto power
Definition
the council cont take action
Term
trust territories
Definition
former colonies taken from defeated nations after World War II
Term
Topography
Definition
shape of the land
Term
elevation
Definition
height above sea level
Term
relief
Definition
difference in elevation between highest and lowest parts of an area.
Term
landform
Definition
feature of topography formed by the processthat shape earth's surface
Term
pixels
Definition
thousands of tiny dots
Term
contour line
Definition
used to connect points of equal elevation.
Term
contour interval
Definition
change in elevation form countour line to countour line
Term
mineral
Definition
naturally occuring, inorganic, solid that has a crystal structure, and a definite chemical composition.
Term
Mohs Hardness Scale
Definition
ranks ten minerals from softest to hardest
Term
streak
Definition
the color of a minerals powder.
Term
luster
Definition
how a mineral reflects light from its surface
Term
cleavage
Definition
a mineral the splits easily along flat surfaces
Term
density
Definition
mass in a given space or mass per unit volume
Term
alloy
Definition
a solide mixture of two or more metals
Term
crystal
Definition
repeating pattern of a minerals particles
Term
texture
Definition
size, shape, and pattern of a rocks grains
Term
grains
Definition
particles of minerals or other rocks
Term
igneous
Definition
forms by colling of molten rock
Term
metamorphic
Definition
an existing rock is changed by heat, pressure, or chemical reactions.
Term
sedimentary
Definition
particles of other rocks or remains on animals are pressed and cemented together.
Term
extrusive ex. basalt
Definition
igneous rock formed from lava that erupted onto earth's surface.
Term
intrusive ex. granite
Definition
igneous rock that formed when magma hardened beneath earth's surface.
Term
foliated
Definition
metamorphic rocks that have their grains arranged in parrallel layers or bands
Term
lithosphere
Definition
uppermost part of the mantle and crust together form a rigid layer
Term
asthenosphere
Definition
a soft layer
Term
crust
Definition
layer of rock that forms earth's outer skin.
Term
mantle
Definition
a layer of hot rock
Term
outer core
Definition
layer of molteb metal that surrounds the inner core.
Term
inner core
Definition
dense ball of solid metal
Term
heat transfer
Definition
movement of energy from a warmer object to a cooler object
Term
radiation
Definition
transfer of energy through an empty space
Term
conduction
Definition
heat transfer by direct contact of particles of matter.
Term
convection
Definition
heat transfer by movement of a heated fluid
Term
mid ocean ridge
Definition
longest chain of mountains in the world
Term
subduction
Definition
when the ocean floor sinks beneath a deep ocean trench and back in the mantle
Term
deep ocean trench
Definition
deep underwater canyon
Term
plate
Definition
the lithosphere is broken into plates
Term
fault
Definition
breaks in crust where rocks have slipped past each other.
Term
rift valley
Definition
a deep valley
Term
divergent
Definition
two plates move apart
Term
convergent
Definition
where two plates come together
Term
transform
Definition
two plates slip past each other.
Term
stress
Definition
a force that acts on rock to change its shape or volume
Term
compression
Definition
squeezes rock until it folds or breaks
Term
tension
Definition
pulls on the crust, stretching rock so that it becomes thinner in the middle
Term
shearing
Definition
stress that pushes a mass in two opposite directions
Term
focus
Definition
point beneath earth's surface where rock that in under stress breaks triggering an earthquake
Term
epicenter
Definition
directly above the focus
Term
seismic waves
Definition
vibrations that travel through earth carrying the energy released during an earthquake
Term
liquefaction
Definition
earthquakes violent shaking suddenly turns loose soil into liquid mud.
Term
Ring of fire
Definition
a major volcanic belt
Term
island arc
Definition
a string of islands
Term
silica
Definition
material formed from oxygen and silicon
Term
geothermal energy
Definition
water heated by magma can create a clean reliable energy source.
Term
batholith
Definition
mass of rock formed when a large body of magama cools inside the crust
Term
bedrock
Definition
solid layer of rock beneath the soil
Term
topsoil
Definition
crumbly dark brown soil that is a mixture of humus clay and other minerals
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