Only one
they traveled because of the dust bowls.
The dust bowl was in the "Great Depression". It was a nick-name for dust storms because the storms were like "rolling black smoke".
Displace it
wind blew the soil east in great black clouds
no
The adjective form of "dust" is "dusty."
Such storms where so strong it could cause death on human people.
Yes, dust devils can form just about anywhere.
Dust is an uncountable noun. It has no plural
The adjective form of "dust" is "dusty."
Chalk is a form of calcium carbonate, so chalk dust is also a form of calcium carbonate.