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Chapter 2 Vocabulary

Lessons 1-3

pure substance simply a substanace
element a substance that cannot be broken down into simpler substances
atom the smallest particle of an element
compound substance made from two or more simpler substances and can be broken down into those simpler substances
heterogeneous mixture the parts of the mixture are noticeably different from one another
homogeneous mixture the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another
solution substances dissolve and form a homogeneous mixture
suspension heterogeneous mixture that separates into layers over time
colloid contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension
physical property any characteristic of a material that can be observed or measured without changing the composition of the substances in the material
viscosity a liquids resistance to flowing
conductivity a materials ability to allow heat to flow
malleability ability or a solid to be hammered without shattering
melting point the temperature from which a solid changes into a liquid, 0 degrees Celsius
boiling point the temperature at which a substance starts to boil, 100 degrees Celsius
filtration process that separates materials based on the size of their particles
distillation process that separates the substance in a solution based on the boiling point
physical change occurs when some of the properties of a material change, but the substances in the material remain the same
chemical property any ability to produce a change in the composition of matter
flammability a materials ability to burn in the presence of oxygen
reactivity property that describes how readily a substance combines chemically with other substances
chemical change occurs when a substance reacts and forms one or more new substances
precipitate any solid that forms and separates from a liquid mixture
Created by: cameryn.lee