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chapter 2 vocab
physical science
Term | Definition |
---|---|
pure substance | simply a substance |
element | a substance that cannot be broken down into smaller substances |
atom | the smallest particle of an element |
compound | a substance that is made from two or more simpler substances and can be broken down into those simpler substances |
heterogeneous mixture | the parts of a mixture that are noticeably different from one another |
solutions | themixture that forms when substances dissolve and form a homogeneous mixture |
suspension | a 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 |
homogeneous mixture | the substances that are so evenly distributed that it is difficult to distinguish one substance in the mixture from another |
physical property | any characteristic of a material that can be observed or measured without changing the composition of the substances in the matreial |
viscosity | the tendancy of a of a liquid to keep from flowing |
conductivity | a material's ability to allow heat to flow |
malleability | the ability of a solid to be hammered without shattering |
boiling point | the temperature at which a substance boils |
filteration | a process that seperates materials based on the size of the particles |
distillation | a process that seperates the substances in a solution based on their boiling points |
physical change | occurs when some of the the properties of a material change, but the substances in the material remain the same |
melting point | the temperature at which a substance changes from a solid to a liquid |
chemical property | any ability to produce a change in the composition of matter |
flammability | a materials ability to burn in the presence of oxygen |
chemical change | occurs when a substance reacts and forms one or more new substances |
precipitate | any solid that forms and seperates from a liquid mixture |
reactivity | the property that describes how readily a substance combines chemically with other substances |