Property - what is being observed or measured, Unit - the standard way that a property is measured. Tells you how big or small something is, Thermometer - Property = temperature; units = C or F, Variable - A factor you want to change or control in an inestigation, Independent Variable - the variable to change because you want to test it (there should be only one), Dependent Variable - the variable to observe or measure for effects caused by the change in the independent variable (can be more than one), Controlled Variable - the variables that are kept the same to keep each test consistent and fair across an investigation, Digital Scale - Property = mass or weight; Units = grams, Molecule / Particle - the smallest piece of a substance, Solid - The particles are very close together and can't move freely, Liquid - Particles have some space and can move more freely, Gas - The particles have a lot of space and can move around freely, Kinetic Energy - How fast or slow the particles move. ,

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