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Terms in this set (32)
which of earth's layers is made of hot, solid metal?
which of earth's layers is made of hot, solid rock?
which of earth's layers is made of thin, cool, solid rock?
which of earth's layers is made of molten(liquid) metal?
what are the 3 parts of the mantle?
lithosphere, asthenosphere, and mesosphere
which layer makes up earth's tectonic plates?
which two layers cause convection currents
core and mantle
which layer is at the center of the earth?
what are the three types of heat transfer?
radiation, convection, and conduction
what causes the tectonic plates to move?
convection currents in the mantle
what is the name of wegener's supercontinent that split apart
what invention allowed scientists to map the sea floor?
how far do the plates move each year?
1 to 12 centimeters
plates move away from each other
plates move towards each other
plates scrape past each other
what type of boundary produces new crust?
what type of boundary destroys crust?
what forms when two plates collide, causing the crust to buckle and push upward?
what natural disaster usually results when crustal plates scrape past one another?
what is the sinking of one plate under another plate called?
what feature is formed where old crust sinks under newer crust and melts into the asthenosphere?
what features are formed at convergent boundaries?
what features are formed at divergent boundaries?
what can be found at the top of mountains that were formed from the collision of two plates?
fossils of sea life
what three types of evidence did wegener use to support his theory?
geology, fossil evidence, climate
why was wegener's theory rejected by other scientists?
he couldn't identify a cause
what 4 pieces of evidence on the sea floor support the idea of sea floor spreading?
where on the ocean floor is the crust the youngest?
rift valley/ mid-ocean ridge
which layer controls earth's magnetic field?
what does heating and cooling affect in a convection current?
density of material
what are the two sources of thermal energy in earth's interior?
gravity and radioactive decay
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