Gg Flashcards
How is heat redistributed through the air?
Hot air rises to form low pressure. Cold air sinks to form high pressure
How is heat redistributed through the ocean?
Cold water is salty and dense so it sinks near the poles. This drags warm water from the equator witch releases heat into the air
Explain stage 1 of tectonic plate movement
Radioactive decay comes from the earths inner core causing heat
Explain stage 2 of tectonic plate movement
The heat rises into the mantle
Explain stage 3 of tectonic plate movement
This causes the magma to plume (rise) upwards as it’s less dense
What is a plate boundary
Where 2 plates meet
What is a divergent boundary
Where plates move apart
What does a divergent boundary form
Shield volcanoes
What is a convergent boundary
Where plates collide
What happens at a divergent plate boundary
Basalt magma rises through the gap
What happens at a convergent boundary
Oceanic plate subducts, as it sinks it melts, plumes rise up through the continental crust, erupting
What forms at convergent boundaries
Strato volcanoes
What happens at conservative boundaries
They slide past each other
What do conservative boundaries form
Earthquakes. They can be very destructive as their epicentres are often shallow
What do sunspots cause
Long term climate change over hundreds of years
What do orbital changes effect
The amount of solar radiation radiation the earth receives every 100,000 years
What do orbital changes cause
Ice ages
Why can volcanic activity do
Release global temperatures by up to 0.5C
Which 2 natural climate change theories affect the earths climate in the same way
Asteroid impacts and volcanic activity
Name the 3 types of climate change evidence
Tree rings
Declining arctic sea ice
Historical records
Name 2 short term reliefs (management of earthquakes) Haiti
First aid kits
Trained paramedics
Name 2 long term planning strategies for earthquakes (Japan)
Earthquake resistant buildings
Tsunami sirens
10m tsunami walls
Name an impact of cyclone sidr in Bangladesh
Tigers and deer were killed
Name an impact of hurricane Katrina in USA
Towns were flooded
Name a management strategy for hurricane Katrina USA
Levvys (they were destroyed killing many people)
Name a management strategy for cyclone sidr Bangladesh
Stormproof buildings (3500 of them)
