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Physical & Chemical Changes Vocabulary

Unit 2
8th Grade

matteranything that has mass and takes up space
massthe amount of matter in something
volumethe amount of space something occupies
propertya characteristic of a substance that can be observed
physical propertya property that can be observed WITHOUT changing the identity of the substance
malleabilitythe ability to be hammered into a thin sheet
ductilitythe ability to be stretched into a wire
melting pointthe temperature at which a substance changes from a solid to a liquid at a given pressure; water = 32 degrees F
boiling pointthe temperature at which a substance changes from a liquid to a gas at a given pressure; water = 212 degrees F
chemical propertya property that can only be observed by CHANGING the identity of the substance
densitythe amount of mass per unit of volume; can be used to identify an unknown substance
specific heata physical property; the amount of energy needed to raise the temperature of 1 kg of a substance 1 degree C
solubilitythe measure of one substance's ability to dissolve in a specific amount of another substance at a given temperature and pressure to form a solution
solutiontwo or more substances are mixed evenly together
conductivitya physical property; the measure of the ability for electricity to travel through a substance
magnetisma physical property; the ability of a material to be attracted or repelled by another material due to a magnetic field
chemical reactiona process that produces a chemical change
catalysta substance that can make something happen faster but is not changed itself
reactantsubstance that exist before the reaction begins
productthe substance formed as a result of the reaction
chemical equationtells a chemist at a glance the reactants, products, physical state, and the proportions of each substance present

North Carolina Virtual Public School

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