7th grade Sci-11
Terms
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- convergent boundary
- boundary at which plates collide
- plate
- large sections of Earth's crust and upper mantle
- transform fault
- place where plates slide past one another
- divergent boundary
- boundary where plates move apart from each other
- plate tectonics
- a theory that states that Earth's crust and upper mantle are broken into sections
- subduction zone
- forms when an oceanic plate collides with a continental plate
- lithosphere
- the crust and a part of the upper mantle; 62 miles thick
- continental drift
- a theory that states that the continents have moved horizontally to their current locations;
- convection current
- force behind plate tectonics
- magnetometer
- instrument for studying Earth's magnetic field
- seafloor spreading
- process that forms new seafloor; spreading apart of the seafloor at the mid-ocean ridges
- Pangaea
- the name for Wegener's one large landmass of long ago
- asthenosphere
- plasticlike layer below the lithosphere