click below
click below
Normal Size Small Size show me how
Chapter 2 Vocabulary
Vocab for Ch. 2.
Term | Definition |
---|---|
Pure Substance | Simply a substance. Ex. Table Salt, Table Sugar. |
Element | A substance that can't be broken down into smaller substances. |
Atom | The smallest particle of an element. |
Compound | A substance that is made up of 2 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 to another. |
Solution | The mixture 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. |
Physical property | any characteristic of a material that can be observed or measured w/out changing the composition of the substances in the material. |
Viscosity | The tendency of a liquid to keep it from flowing, it's resistance to flowing. |
Conductivity | The material's ability to allow heat to flow. |
Malleability | ability of a solid to be hammered without shattering. |
Melting Point | temperature at which a substance changes from a solid to a liquid. |
Boiling Point | temperature at which a substance boils. |
Filtration | a process that separates materials based on the size of their particles. |
Distillation | a process that separates the substances in a solution based on their boiling points. |
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 | the 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 |