WorksheetsPlate tectonics
Total questions: 40
Worksheet time: 1hrs 20mins
Subduction means.....
one plate goes under another plate
two plates slide past each other
two plate collide and form folded mountains
The process that causes the tectonic plates to move is called.....
subduction
transform
convection
Magma that erupts out of volcanoes comes from.....
melted transform crust
melted oceanic crust
melted continental crust
When oceanic and continental crust collide what feature would form?
volcanic island arc
folded mountain
volcanoes on the continent
Subduction means.....
one plate goes under another plate
two plates slide past each other
two plate collide and form folded mountains
divergent plates move
away fro each other
towards each other
slide past each other
Sea-floor spreading explains how.....
new crust is created at a divergent boundary
volcanoes are formed on continents
deep sea trenches are formed
At a transform boundary the plates.....
collide
diverge
slide past each other
This area is called the....
Arc of Volcanoes
Ring of Fire
Horseshoe of Magma
The movement of the tectonic plates is caused by
the rotation of the Earth.
convection currents in the Asthenosphere
the gravity of the iron-nickel core.
the Moho discontinuity.
In some areas of the world, like California and Japan, earthquakes are a common occurrence. How can this best be explained?
The strong ocean currents are undermining both areas causing earthquakes.
Both areas are located near the edge of the Pacific Ocean, the unstable sand causes earthquakes.
Both areas are subjected to strong ocean wind and waves that causes earthquakes.
Both areas are on the boundary of active plates, the motion of the plates causes earthquakes.
Observe this diagram of a plate boundary. One statement BEST describes what is happening. It is that
the oceanic crust is melting.
the denser ceanic crust is subducting under the less dense oceanic crust
volcanic islands are forming.
the tectonic plates are moving away from each other.
Earthquake epicenters (center of where the earthquakes started) were mapped for a 35 year period in the diagram above. The black dots indicate these epicenters. The black dots appear along what feature on Earth?
hot spots
plate boundaries
rift zones
sea floor spreading
Where are earthquakes MOST LIKELY to occur?
close to the equator
close to the center of tectonic plates
at divergent or convergent plate boundaries
at transform plate boundaries
___________ currents in the Earth's asthenosphere cause plate to shift at their boundaries. This movement also causes earthquakes and volcanic activity.
conduction
convection
radiation
ocean
