Flashcards in Glossary: Restless Earth Deck (42):
Collision boundary/ margin
Where two plates are moving together (destructive) and upward, creating mountains.
Conservative boundary/ margin
Where two plates pass alongside each other.
Constructive boundary/ margin
Where two plates move apart.
The theory that describes how plates have moved over millions of years.
Movement of magma within the Earth's mantle, formed by radioactive decay creating heat.
The outermost layer of the Earth.
A sudden and violent shaking of the Earth's crust.
Mountains formed by plate collision, crumpling rock layers.
Where magma plumes rise away from plate boundaries, breaking through the crust.
Molten rock within the Earth's mantle.
An inner section of the Earth - liquid comprising mostly of iron, at 10-12 g/cm cubed.
A huge section of the Earth's crust.
Plate boundary/ margin
Where any two plates meet.
The theory of the distribution of earthquakes, volcanoes, fold mountains and plate movement.
Measures the strength/magnitude of an earthquake - 0 to 10.
The sinking movement of one plate beneath another at a destructive margin.
Changes taking place in the structure of the Earth.
A wave, often generated by an earthquake, which displaces water and causes devastation.
The opening of a volcano.
Cone-shaped mountain created by lava from repeated eruptions.
Thin 'runny' lava, low silica content, flows long distances.
The depression of a supervolcano, marking the collapsed magma chamber
Steep-sided cone with successive layers of ash and lava
The point at the Earth's surface directly above the focus of an earthquake
Extended opening along a line of weakness, allow magma to escape to the surface
The point where an earthquake originates
A geothermal feature in which water erupts into the air under pressure
Water that is heated beneath the ground, which comes to the surface in a variety of ways
An event where lives and property are threatened, resulting in damage and/ or death
How people react as the disaster happens and in the immediate aftermath
Secondary effect of a volcano where mudflows form from the mixing of ash and melted ice/ water
Name for magma once at the Earth's surface
Long term responses
Later reactions that occur in the weeks, months and years after the event
The dense, mostly solid layer between the outer core and the crust
Measures the destructive power of an earthquake - I to XII
Deep sections of ocean where an oceanic plate subducts below a continental plate
Attempts to forecast an even - where and when it will happen - based in current knowledge
Constructing buildings so that they are safe to live in and will no collapse
Organising activities and drills so that people know what to do in an earthquake
Gentle sides, wide base made of basic lava
Seismic waves generated by an earthquake that pass through the earth's crust