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Flashcards in natural disasters Deck (18):
1

how are hurricanes formed?

they draw heat from warm ocean air and releases it through condensation in thunderstorms

2

what happens if there is no water (for a hurricane)?

the hurricane dies

3

what causes hurricanes?

warm ocean air rises and leaves an area of cold low pressure air
the area is replaced with more warm air and also rises
more cold air goes into the low pressure area
the cycle repeats

4

how far inland can a hurricane extend?

100 miles

5

how much rain does a hurricane drop in a day?

over a trillion liters

6

how strong do hurricane winds reach?

74 mph

7

name two hazards of a hurricane

destroy houses and buildings
can kill people

8

what is a volcano?

vents in the earth's surface from molten rock, debris and steam

9

when and how does volcanic activity occur?

when tectonic plates move toward each other or away from each other

10

where are 90% of the volcanoes located?

in the ring of fire (a band of volcanoes circling the edge of the pacific ocean)

11

name one way we can predict a volcanic eruption

increase in sulfur dioxide

12

how are earthquakes formed?

two tectonic plates converge, sending ripping shockwaves and building pressure
seismic waves that make the ground shake when two plates collide or slide past each other

13

when do earthquakes occur?

daily, but most are too insignificant to be felt

14

name five hazards of an earthquake

collapsed buildings
mudslides
fires
floods
tsunamis

15

how are tornadoes formed?

warm moist air meets cold dry air, which creates an updraft and makes a funnel
when the funnel reaches the ground, a tornado is formed

16

name three hazards of a tornado

roofs can be torn off houses
$400 million worth of damage
kills about 70 people a year

17

how fast can a tornado move?

50 km/h

18

how wide can a tornado be?

200 m