matter - anything that takes up space and has mass, measurable - something that can be measured or quantified, testable - something that can be tested or experimented with, observable - something that can be seen or perceived, physical properties - characteristics that can be observed or measured without changing the substance, mass - the amount of matter in an object, magnetism - the property of attracting certain metals, relative density - how much matter is in a given space, physical state - the state of matter: solid, liquid, or gas, volume - the amount of space that matter takes up, dissolve - to mix a substance completely into a liquid, solubility - how easily a substance dissolves in water, solution - a liquid mixture where one substance is dissolved into another substance, conductor - a material that allows electricity or heat to flow through it easily, insulator - a material that does not allow electricity or heat to flow through it easily, thermal energy - the energy of heat, electric energy - the energy of electricity,

Classifying Matter

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