Geography Test Study Flashcards
Name the seven major plates
Eurasian plate, African plate, North-American plate, South-American plate, Nazca plate, Pacific plate and Indo-Australian plate
Name the four layers of the Earth
Crust, Mantle, Outer core, Inner Core,
What plate boundary is it when plates collide
Destructive plate boundary
What boundary is where plates separate
Constructive plate boundary
How does the magma come up to the earths surface.
Through a vent
Where is the magma kept before it explodes from the volcano
Magma chamber
What do volcanologists use to measure the force of the eruption
( VEI ) volcanic Explosity index
What is the point inside the earths crust where the earthquake starts called
Focus
What is the name of the shock waves that travel out from the focus called
Tremors
What is the place on the earths surface direct,y above the focus called
Epicentre
What are the little or big earthquakes called after the main earthquake
Aftershocks
What is the name of where 70% of all earthquakes take place
The Pacific Ring Of Fire
Name two economical and environmental impact of 1980 mt St Helens
Economical = 57 people died and hundreds of people lost their home and were left without a job
Environmental impacts = 150 new lakes were formed and existing lakes flooded their banks
Write out the three stages of a volcanoes life
Active
Dormant
Extinct