States of matter - The ways in which matter (things) exist., Water vapour - Water in the form of gas, Flammable - Something that is easily set on fire., Submerge - To cause something to go under water., Vacuum - A space with no matter., Compressed - When something is flattened (by pressure), Carbon dioxide - A colourless, odourless gas., Pneumatics - The branch of physics concerned with the mechanical properties of gases.,

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