Final answer:
Gases have no definite shape or volume, while plasmas are highly energized states of matter consisting of ionized particles that conduct electricity.
Explanation:
The main difference between a gas and a plasma lies in their physical state and behavior.
Gases are considered as having no definite shape or volume, whereas plasmas are highly energized states of matter consisting of ionized particles. Plasma conducts electricity, while gases do not exhibit this behavior.
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