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MDTMS Sci. Completio
DESCRIBES THE COMPLETION FILL IN THE BLANKS FOR THE SCIENCE MDTM
Question | Answer |
---|---|
rift valley | continental plates pulling apart |
convection currents | movement of fluid or gas caused by temp diffs. wlo heat. it stops. |
geologists | study the geological history of earth and its life forms |
conduction | transfer of heat through direct contact. |
continental drift | idea posed by alfred wegner that approx 300 mya there was a large mass of continents ( or "supercontinent") which were all the continents together. slowly have moved across surface since then. |
fossils | the fossils of the glossopteris fern were found all over the world. |
radiation | transfer of heat through empty space |
transform | break in earth's crust where slabs of rock slide past each other |
deep-ocean trench | underwater canyon where crust sinks back into mantle |
subduction | process in which the ocean floor sinks back into the mantle. |
pangaea | supercontinent that existed 300 mya |
s waves | secondary waves; moves in a SHEAR motion |
focus | point of initial rupture |
ring of fire | chain of volcanoes all around the world |
island arc | forms when 2 oceanic plates collide |
streak | color of a mineral's powder |
luster | how a mineral reflects in light |
compaction | rock solidifies when it compacts |
heat | metamorphic rocks change when they are under a certain amount of heat |
erosion | movement of rock by wind, water, ice, and gravity |
loam | soil made from clay, sand, and plants |
dust bowl | plowing xposed soil, wind blew the soil and caused a duststorm |
climate | hot/wet climates make rocks weather faster. |
fossils | petrified remains or traces of living things |
gap in geological record | unconformity |