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STORM STORY 38-39
Did you know? TICKER
The Navajo, Mars has dust devils that are fifty times as wide and ten times as high as the ones on earth.
a Red Indian
tribe, call
the dust devils
‘chindii’ and
believe that
they are the
spirits of their
ancestors.
That’s my grandpa!
Raising dust …
More hot air A dust devil needs flat and empty ground
enters from to be formed. It needs clear skies, as the
the bottom, ground needs to absorb a lot of heat. There
increasing should be a very light wind or no wind at all,
the spin and because a strong wind can spoil the spinning. The
forming the atmosphere above should be cool.
dust devil.
As the dust devil carries sand particles up into the air and
spins them, these particles rub against each other and create
electric fields with a strength of up to ten thousand volts per
metre. This helps the dust devil to raise even more dust into the
atmosphere. Very high quantities of dust can be lifted
up by dust devils.
In September 2000, a fairground
in Arizona, United States, was
struck by a huge dust devil.
It had a diameter of more
than ninety metres
and a wind speed
of a hundred
kilometres per
hour. The tents
and stalls on the
fairground were
destroyed, and
people suffered
serious injuries.
Did you know? TICKER
The Navajo, Mars has dust devils that are fifty times as wide and ten times as high as the ones on earth.
a Red Indian
tribe, call
the dust devils
‘chindii’ and
believe that
they are the
spirits of their
ancestors.
That’s my grandpa!
Raising dust …
More hot air A dust devil needs flat and empty ground
enters from to be formed. It needs clear skies, as the
the bottom, ground needs to absorb a lot of heat. There
increasing should be a very light wind or no wind at all,
the spin and because a strong wind can spoil the spinning. The
forming the atmosphere above should be cool.
dust devil.
As the dust devil carries sand particles up into the air and
spins them, these particles rub against each other and create
electric fields with a strength of up to ten thousand volts per
metre. This helps the dust devil to raise even more dust into the
atmosphere. Very high quantities of dust can be lifted
up by dust devils.
In September 2000, a fairground
in Arizona, United States, was
struck by a huge dust devil.
It had a diameter of more
than ninety metres
and a wind speed
of a hundred
kilometres per
hour. The tents
and stalls on the
fairground were
destroyed, and
people suffered
serious injuries.
