Earth's innermost layer —?
Solid, mainly iron and nickel
Outer core —?
Liquid, generates Earth's magnetic field
Mantle —?
Semi-molten rock, drives plate movement
Oceanic crust —?
Thin, dense, young crust
Continental crust —?
Thick, less dense, older crust
Destructive boundary —?
Plates converge, causes subduction and volcanoes
Constructive boundary —?
Plates diverge, magma forms new crust
Conservative boundary —?
Plates slide past, causes earthquakes
Collision boundary —?
Continental plates collide, forms mountains
Plate movement mechanism —?
Convection currents in mantle
Shield volcano —?
Broad, gentle, low-viscosity lava eruptions
Composite volcano —?
Tall, steep, high-viscosity magma, explosive
Earthquake focus —?
Origin point inside Earth where quake starts
Epicentre —?
Surface point directly above focus
Seismograph —?
Records seismic waves during earthquakes
Richter scale —?
Measures earthquake magnitude quantitatively
Answer 8 questions on Earth's Dynamic Geology.
1. In what year did Giuseppe Mercalli develop the scale used to measure earthquake intensity based on observed effects?
2. When was the scientific classification of volcanoes into shield and composite types most widely established?
Go over the full study guide for Earth's Dynamic Geology.
Read the study guide →Upload your class notes and Revizly writes your flashcards in about a minute.
Flashcard maker