Chpt 15 Science Vocab

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Chpt 15 Science Vocab
2009-11-15 16:17:16
Physical Property

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  1. atom
    the smallest piece of matter that still retains the property of the element
  2. characteristics of physical properties
    a description of a substance; color, state of matter, temperature, volume, etc.
  3. chemical change
    a change of one substance to another
  4. chemical property
    a characteristic of a substance that indicates whether it can undergo a certain chemical change
  5. colloid
    • a type of mixture with particles that are larger than those in the solutions but not heavy enough to settle out.        
    • (colloid-greek, glue)
  6. compound
    a substance in which the atoms of two or more elements are combined in a fixed proportion
  7. distillation
    the process for separating substances in a mixture by evaporating a liquid and
  8. element
    all the atoms in a substance have the same identity
  9. elements in laboratory
    20 other elements have been made laboratories
  10. elements on earth
    about 90 elements are found on earth
  11. flammability
    the tendency of a substance to burn
  12. heterogeneous mixture
    a mixture in which different materials can be distinguished easily
  13. homogeneous mixture
    contains two or more gaseous, liquid, or solid substances blended evenly throughout
  14. law of conservation of mass
    the mass of all substances that are present before a chemical change equals the mass of all the substances that remain after they change
  15. mixture
    a material made up of two or more substances that can be easily separated by physical means
  16. odor
    a certain aroma
  17. physical change
    a change in size, state, or shape of matter
  18. physical properties
    any characteristic of a material that you can observe without changing the identityof the substances that make up the material
  19. solution
    a homogeneous mixture of particles so small that they cannot be seen with a microscopeand will never settle to the botton of their container
  20. substance
    a type of matter with a fixed composition
  21. suspension
    a heterogeneous mixture containing a liquid in which visible particles settle
  22. tarnish
    a chemical reaction between silver metal and sulfur compounds in the air which results in silver sulfide
  23. total mass of product
    the total mass of reactants
  24. Tyndall Effect
    the paticles in the colloid are large enough to scatter light, but those in the solution are not