Final answer:
The two primary categories of explosions are high and low order explosions.
Step-by-step explanation:
The two primary categories of explosions are high and low order explosions.
High order explosions refer to explosions that release a large amount of energy in a short period of time, such as a dynamite explosion.
Low order explosions, on the other hand, refer to explosions that release a smaller amount of energy over a longer period of time, like a firecracker explosion.