Terms in this set (38)
Oceanic plates are pushed into the upper mantle in
Continental Drift occurs because of
SEA FLOOR SPREADING
The presence of the same __________________ on several continents supports the idea of continent drift
FOSSILS AND ROCKS
The youngest rocks in the ocean floor are located at the mid-ocean
The cycle of heating, rising, cooling and sinking is called a
The _________________ are forming where the Indo-Australian Plates collides into the Eurasian Plate
As Earth's plates move apart at some boundaries, they collide at others, forming _______________________.
MOUNTAINS, VOLCANOES AND OCEAN BASINS
The results of plate movement can be seen at
RIFT VALLEYS, PLATE BOUNDARIES
Where plates slide past one another ________________ occur.
The hypothesis that continents have moved slowly to their current locations are called
The places between plates moving together are called
Plates move apart at _____________________ boundaries.
The seafloor spreading theory was proposed by
Seafloor spreading occurs because________________ below the earth's crust is forced upward toward the surface.
HOT, LESS-DENSE MATERIAL
Ocean floor rocks are ________________ continental rocks
The lack of an explanation for continental drift prevented many scientists from believing a single super-contintinent called _______________once existed
The alignment of iron-bering minerals in rocks when they formed reflects the fact that earth's _________________ has reversed itself several times in the past
Scientists aboard the ____________________added to the evidence for theory of seafloor spreading by providing _________________________.
SAMPLES OF .ROCK FROM DIFFERENT LOCATIONS
Earth plastic-like layer is the
The rigid part of the plates of the _______________ are made of oceanic crust or continental crust and upper mantle
Theory that describes Earth's crust and upper mantle as being broken into sections is called
The name _____________ means "all land"
______________________, occurring in the mantle, are thought to be the force behind plate tectonics
Studying the ocean floor, scientists found rocks showing magnetic
The theory of _______________ was shown to be correct by age evidence and magnetic clues
The main lines of evidence for ____________________ are fossils,rocks, and climate clues, and the theory of seafloor spreading
The theory that describes Earth's crust and upper mantle as being broken into sections is called
Earth's _____________ move around on a special layer of the mantle
______________ and ocean plate sinks under a continental plate or one plate sinks under another ocean plate at a subduction zone
_______________ occurs when two plates slide past one another in opposite directions or in the same direction at different speeds
____________ plates move apart
___________________ occurs when two continental plates collide and crumble up forming mountain ridges
______________ is the force created at convergent plate boundaries
____________ is the force created at divergent plate boundaries
________________ takes place when earth's magnetic field changes
________________ is the magnets point north when earth's magnetic field has this
_______________ is the magnets point south when earth's magnetic field has this
Know the layer of the Earth's surface
CRUST, LITHOSPHERE, ASTHENOSPHERE, OCEANIC CRUST, AND UPPER MANTLE