tectonics Flashcards
volcano primary hazards
-gas
- ash
- lava
- volcanic bombs
- earthquakes
volcano secondary hazards
- hunger : crops are destroyed therefore nothing to eat
- homelessness
- disease
- flooding
- deaths
- unemployment
impacts of earthquakes happening during the day
- more people at work or commuting : families separated
BUT : can see thats happening
impacts of earthquakes happening at night
- its dark : you cant see whats going on
- therefore difficult to access damage and find the route to safety : cant find emergency kit
impacts of earthquakes happening during summer
- warmer : shelter is in sun
- warmer temps higher risk of disease : decomposing bodies
- can get dehydrated
impacts of earthquakes happening during the winter
- colder temps : need warmth, warm food, blankets
- much lower risk of diseases
- less risk of dehydration
- but more risk of getting killed from the cold
what to have in your emergency earthquake kit
- water : 4 litres per person
- food - nonperishable
- flashlight
- lanterns
- AM/FM radios : battery operated
- batteries
- dusk masks : one for each family member
- paper money : electricity will be down
- toiletries
first aid kit - clothes and blankets
active volcano
eruption can be anytime and often
dormant
has been a while since it has erupted but could at any time
ectinct
hasn’t erupted in a very long time therefore probably wont ever
volcano structure : main vent
the weak point in the earths crust where hot magma has been to rise from the magma chamber and reach the surface
volcano structure : secondary vent
produce secondary cones on the flank of the volcano
volcano structure : crater
a bowl or funnel shaped depression that usually lies directly above the vent from which volcanic material is ejected
volcano structure : magma chamber
The location beneath the vent of a volcano where molten rock (magma) is stored prior to eruption.
volcano structure : layers of ash
alternating layers (strata) of lava, ash, cinders, blocks, and bombs