Earth's Layers
Tectonic Plates
Volcanoes
Mountains
Earthquakes
100
In simple terms, earth has this many layers
What is 4
100
The three directions of plate movement.
What is convergent, divergent and transform
100
The molten rock material that comes out of a volcano is called this.
What is lava
100
Fold mountains, like the Himalayas, form when two continental plates are doing this.
What is converging
100
Earthquakes are caused by this type of plate movement
What is sliding past each other
200
The surface layer, called crust, is composed mainly of this material.
What is rock
200
The two types of plates.
What are oceanic and continental
200
The opening at the top of a volcano where material spews out from is called this.
What is the vent
200
The most common type of mountain is this type.
What is fold
200
A crack in the earth's crust where earthquakes are more likely to occur is called this.
What is a fault line
300
The layer under the crust, composed of both thick liquids and solids is called this.
What is the mantle
300
The theory of plate tectonics, proposed by Alfred Wegner, is referred to as this.
What is Continental Drift
300
80% of the world's volcanoes occur in this region around the pacific plate
What is The Ring of Fire
300
The highest point in the world is this mountain peak in the Himalayas
What is Mt. Everest
300
The scale used to measure the strength of an earthquake is called this.
What is the Richter Scale
400
The solid inner core is composed mainly of these two metals.
What is iron and nickel
400
The name given to the one large super continent 250 million years ago
What is Pangaea
400
The term for melted rock in a volcanoes chamber.
What is magma
400
The largest mountain range, created by seafloor spreading, is called this.
What is the Mid-Atlantic Ridge
400
This US state experiences earthquakes on a more frequent basis.
What is California
500
These currents bring heat from the hot part of the mantle to the cooler parts of the mantle, and are believed to contribute to plate movement.
What are convection currents
500
When a thin, dense oceanic plate collides with and is pushed under a less dense, thick continental plate, it is called this.
What is subduction
500
Volcanic islands form this US state
What is Hawaii
500
A Plateau mountain is smoothed out on top by these forces.
What is erosion
500
The earthquake that struck the East coast back in September, registered approx. this number on the Richter Scale
What is 5.6
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