Science Mid-term

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Author:
pwnthezone
ID:
59922
Filename:
Science Mid-term
Updated:
2011-01-17 18:05:16
Tags:
science
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Description:
some questions on my midterm
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  1. the increase in volume of a material when its temperature increases
    thermal expansion
  2. process that separates materials based on the size of their particles
    filtration
  3. ability of a solid to be hammered without shattering
    malleability
  4. tendancy of a liquid to keep from flowing. Resistance to flowing
    viscosity
  5. substance that cannot be broken down into simpler substances
    element
  6. light given off by the element neon
    neon lights
  7. what causes reaction rates to increase?
    temperature
  8. type of mixture in which the parts of the mixture are noticeably different from one another
    heterogeneous mixture
  9. type of mixture in which the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another
    homogeneous mixture
  10. matter that has the same composition; an element or compound
    pure substance
  11. what happens to the energy of molecules as temperature rises?
    their speed increases
  12. who did what to get our current model of an atom
    James Chadawick discovered neutrons and showed that electrons can nbe anywhere within a limited area.
  13. atoms of a given element that have different numbers of neutrons and different mass numbers
    isotopes
  14. time required for one half of a sample of a radioactive isotope to decay
    half-life
  15. having others critique your experiment
    peer review
  16. substance that affects the rate of a cheical reaction without being used up in the reaction
    catalyst
  17. phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first
    sublimation
  18. the phase change in which a substance changes from a gas or vapor to a liquid
    condensation
  19. the process that changes a substance from a liquid to a gas at temperatures below the substance's boiling point
    evaporation

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