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IGHS Winkels
Physical Science Chapter 2
Question | Answer |
---|---|
Pure Substance | matter that always has exactly the same composition |
Element | a substance that cannot be broken down into simpler substances |
Atom | 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 the mixture are noticeable different from one another |
Homogeneous Mixture | substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another |
Solution | the mixture that forms when substances dissolve and form a homogenous mixture |
Suspension | a heterogenous mixture that separates into layer 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 | is any characteristic of a material that can be observed or measured without changing the composition of the substances in the material |
Viscosity | the tendency 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 |
Melting Point | the temperature at which a substance changes from solid to liquid |
Boiling Point | the temperature at which a substance boils |
Distillation | a process that separates the substances in a solution based on their boiling points |
Filtration | a process that separates materials based on the size of their particles. |
Physical Change | occurs when some of the properties of a material change |
Chemical Property | any ability to produce a change in the composition of matter |
Flammability | a material's ability to burn in the presence of oxygen |
Reactivity | the property that describes how readily a substance combines chemically with other substances |
Precipitate | any solid that forms and separates from a liquid mixture |
Chemical Change | occurs when a substance reacts and forms one or more new substances |