If the dust comes from a flammable/combustible material - sure. But you'd still need a flame or a spark to set it off.
fallout
A dust explosion occurs when a flammable substance in powder form suspended in the air ignites and burns rapidly. When a substance is pulverized, the surface area that is directly exposed to the air increases dramatically. This large surface area allows the combustion reaction to occur much more rapdily than would normally be possible, causing an explosion. Substances that can produce dust explosions include sawdust, grain dust, coal dust, starch, flour, and even some metals.
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The explosion is believed to have been caused by the air burst of a large meteoroid or comet fragment at an altitude of 5-10 kilometres (3-6 mi) above the Earth's surface.
When the rods were dropped in only the graphite tips touched it and this caused an explosion, it was because of a design fault
There was only one explosion on the Lusitania. It was caused by a German torpedo hitting the ship during World War I, leading to its sinking. There were no subsequent explosions.
They are caused by an explosion of dinoflagellates
Dry dust in the air can explode. Removing the dust prevents the possibility of an explosion.
There is a greater risk of explosion with dust in the air rather than dust on ground. This due to the fact that dust combusts quickly and air supports combustion while the ground does not.
fallout
Sugar dust particles will ignite and this will be called the primary explosion, the primary explosion will unsettle more dust and cause a secondary explosion and the second blast will be more powerful. This then can be at threat to other easily combustibles items in the vicinity.
TNT (the dynamite that caused the explosion) pop (the sound a small explosion might make)
It might be because of dust in the atmosphere elevated by the explosion. Particles of dust absorb and scatter visible light very well. And the sky turn to black because there is on light coming through dust clouds.
Cause dust can combust real fast and air supports burning the ground doesn't
It wasn't that big! The theory is that a large meteor hit the Earth and the explosion caused a large amount of dust in the upper atmosphere which caused climate change and the dinosaurs (or most of them) didn't survive.
an explosion
stuff!