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Science Grade 7
Plate Tectonics
30
Science
7th Grade
10/05/2022

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Term
earthquake
Definition
the rupture and sudden movement of rocks along a break or crack in Earth's crust.
Term
Causes of Earthquake
Definition
The force acting on tectonic plates, when these blocks move earthquakes occur.
Term
fault
Definition
The surface along which the crust moves
Term
Where do earthquakes occur?
Definition
Near Plate Boundaries
Term
How are mountains created
Definition
compression and tension forces produce ridges and mountains
Term
liquefaction
Definition
the process of making or becoming liquid
Term
What causes Tsunamis
Definition
Earthquakes that happen under water.
Term
Magma
Definition
Molten rock below earths surface
Term
Where do Volcanoes form?
Definition
At divergent plate boundaries, convergent plate boundaries and hot spots.
Term
Hot spots
Definition
Locations where volcanoes form from plate boundaries
Term
Name a Hot spot
Definition
Yellowstone national park
Term
Convergent boundary moves in what direction
Definition
Plates move towards each other
Term
Divergent boundary moves in what direction
Definition
Plates Move apart from eachother
Term
Most of the Earth's largest Volcanoes are located at what Plate boundary?
Definition
Convergent
Term
What causes a volcano to erupt?
Definition
When magma builds up, it forces its way up to the surface and erupts
Term
What comes out of a volcano?
Definition
Lava
Term
lava flows
Definition
long streams of molten rock
Term
Volcanic ash
Definition
small pieces of Lava
Term
Transform boundaries move in what direction
Definition
plates slide past each other in opposite direction
Term
Do continents move?
Definition
Yes
Term
compression
Definition
squeezing force at a convergent boundary
Term
tension
Definition
Pulling force at a divergent boundary
Term
shear
Definition
side-by-side dragging force at transform boundary
Term
Name two types of volcanoes
Definition
composite and shield volcano
Term
caldera
Definition
large depression in the center of the volcano
Term
Earth's Mantle is made up of what?
Definition
Solid Rock
Term
Theory of Plate tectonics
Definition
Earths crust is broken into rigid Plates that move slowly over EArths surface
Term
Techtonic plates
Definition
rigid plates
Term
What was Alfred Wegener's Hypothesis?
Definition
that continents move called the continental Drift
Term
subduction zone
Definition
area where one plate slides under aother
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