Auckland
Name an Auckland natural feature
Lake, sea, mountain, etc
Name the 2 types of crust.
Oceanic and continental
Describe the direction of a transform boundary.
Side by side (rubbing up and down)
What is the Māori name for White Island?
Whakaari
What % of plate boundaries are found around the Pacific region?
90%
How many volcanoes are in Auckland
53
Name the 5 layers of the earth.
Crust, upper mantle, lower mantle, outer core, inner core
Describe the direction of a divergent boundary.
Plates moving apart
Approximately how many earthquakes occur in NZ each year?
15000
The Ring of Fire is home to what % of the world’s earthquakes?
75%
What volcano is named after a single tree?
One Tree Hill
What is the mnemonic used to remember the 5 layers of the earth?
Crazy uncles like overcooked icecream
Describe the direction of a convergent boundary.
Plates moving together
What is the name of a deep crater in a volcano?
Caldera
True or false. All of Auckland's volcanoes come from one magma source.
True
What is the AVF?
Auckland Volcanic Field
Name 2 tectonic plates under New Zealand.
Indo-Australian and Pacific plates
What is another name for the upper mantle?
Asthenosphere
What are located throughout NZ including Auckland where volcanoes can erupt?
Hotspots
Name 3 types of lava.
Basaltic, A'a, Scoria, Pahoehoe
What is the island behind Rangitoto called?
Motutapu
A constant motion in the mantle creates what?
Convection currents
Name a natural consequence of convergent boundary movement when ocean plate gets pushed under continental plate.
Tsunami
Sea-floor spreading occurs where tectonic plates are …… (direction and name)
Moving apart (diverging)
Describe basaltic lava.
Basaltic Lava, Most common in the AVF. Dark-coloured, fine-grained rock made from low-silica magma. Erupts at high temperatures (~1100–1200°C), so it flows easily and can travel a long way before cooling.