tectonic plate boundaries Flashcards
(37 cards)
what’s a convergent plate?
when the plates push out in opposite directions leaving a space for volcanoes to erupt
what is a conservative plate?
when the two platr boundaries rub along eachother to form earthquakes
what is a destructive plate?
when the the oceanic plate gets pushed underneath the continental plate leaving room for volcanoes to erupt
what is a destructive collision boundary?
when two plates push against eachother and one get broken and piles up above creating a mountain range
what are earthquakes measured with?
seismographs, and then they are given a number on the richter scale
what is the high test recorded earthquake?
a 9.5 in Chile may 22nd 1960
can earthquakes be predicted?
no, but the areas can be predicted
foreshocks could be detected
animals could act strangely
using specific technology, bulges in the ground can be detected
what should you do to plan for an earthquake?
-have an emergency kit
-make an emergency plan
-make buildings earthquake proof
-organiser regular earthquake drills (drop cover hold)
what do you need in a grab bag?
water + food
warm protective clothing
torch + power bank
sleeping bag
first aid + hygiene products
what can you do to protect yourself?
make earthquake resistant buildings
-use cross bracing
-place bricks so they’re sturdier
-shatter proof glass
-shock absorbers
-deep foundations
-steel to make building sway instead of collapsing
what are things that influence impacts of earthquakes?
-the type of building your in
-what warning you get
-where it occurs (land, water, deserts)
-the size of the earthquake?
what is the epicentre?
the main point of the earthquake
what’s a deep and a shallow earthquake?
a shallow quake would be closer to land but a deep one would be further down
would there be a difference in the impact of the earthquake depending if it’s shallow or deep?
if a quake is a 6.3 or doesn’t matter where it is the waves would still be the same height, but if it was shallow the energy would reach the surface causing more damage
what are impacts of earthquakes?
-tsunamis
-ground cracking
-criminals escaping
-cannot get to work or school
-supplies needed
-buildings destroyed
-animals/ people injured or killed
-gases released
-roads destroyed
-homeless
what is an earthquake?
when two tectonic plates try to move past eachother but get stuck and lots of pressure builds up. when the plates finally move the pressure releases causing the ground to shake
where is new zealand?
south east of australia
two islands
in the pacific ocean and southern ocean
in the southern hemisphere
what plates are new zealand on?
the indo australian and pacific,
which are destructive plate boundaries
where is christchurch?
-the south island in new zealand
-on a destructive plate
-on the south east of south island
-a city
right where the plates meet up
what is a primary effect?
an effect caused by the earthquake (buildings collapsing)
what is a secondary effect?
an effect caused by the primary effect (injuries, money needed for repairs, jobs lost)
what is the response?
something done/an action after the event
what is liquefaction
when the ground shakes, water rises making things go wonky, then when the water settles back down the objects don’t go back to their original positions
which earthquake had more damage, haiti or christchurch?
haiti
-had less money
-complete different living situation
-more destruction
-had to ask for help as countries weren’t doing so
-more injuries and children
