OCI 8th Science Ch 6.1

Ms. Dewey (United States of America)
Science vocabulary words from CPO Physical Science
19 words 86 learners

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Full list of words from this list:

words only definitions & notes
  1. static electricity
    electricity produced by friction
    Here an errant spark—or even static electricity—can set off a massive explosion. Scientific American (Apr 19, 2012)
    The build up of either positive or negative charge; made up of isolated, motionless charges.
  2. electron
    an elementary particle with negative charge
    A single electron orbiting a proton can occupy only certain, discrete energy levels, which are described by the laws of quantum mechanics. Scientific American (Apr 19, 2013)
    a particel with an electic charge (-e) found inside of atoms but outside the nucleus.
  3. proton
    a stable particle with positive charge
    A single electron orbiting a proton can occupy only certain, discrete energy levels, which are described by the laws of quantum mechanics. Scientific American (Apr 19, 2013)
    a particle with an electric charge (+e) found in the nuclues of atoms.
  4. neutron
    a subatomic particle with zero charge
    The proton and neutron turn out to be composed of even smaller particles called quarks. Salon (Nov 25, 2012)
    a particle with zero charge found in the nucleus of atoms
  5. nucleus
    the positively charged dense center of an atom
    At first, each atom’s nucleus arose in a swollen, squashed state with little chance of survival. Scientific American (Dec 6, 2012)
    the tiny core at the center of an atom containng most of the atom's mass and all of its positive charge
  6. atomic number
    quantity of protons in the nucleus of an atom of an element
    After this discovery, chemists turned to using atomic number as the fundamental ordering principle for the periodic table, instead of atomic weight. Scientific American (Jan 21, 2011)
    the number of protons in the nucleus. The atomic number determines what element the atom represents.
  7. isotope
    atom with same atomic number, different number of neutrons
    Radioactive isotopes can be used to estimate the age of formation. Scientific American (May 9, 2013)
    Atoms of the same element that have different numbers of nuetrons in the nucleus.
  8. mass number
    the sum of the number of neutrons and protons in an atomic nucleus
    The mass numbe rof carbon-13 is 13.
    the number of protons plus the number of neutrons in the nucleus.
  9. radioactive
    exhibiting or caused by emissions in nuclear decay
    Used nuclear fuel is still radioactive, so figuring out a way to safely contain it presents quite a challenge. Forbes (Apr 16, 2013)
    a nucleus is a radioactive if it spontaneously breaks up, emitting particles or energy in the process.
  10. stable
    not taking part readily in chemical change
    Almost all elements have onr or more isotopes that are stable.
    The nucleus stays together. The nucleus of an atom becomes unstable if it contains too many or too few neutrons relative to the number of protons. If the nucleus is unstable, it breaks apart.
  11. electric charge
    the quantity of unbalanced electricity in a body (either positive or negative) and construed as an excess or deficiency of electrons
    Antimatter particles are the "mirror image" of normal matter, but with opposite electric charge.
    a fundamental property of matter that comes in two types called positive and negative
  12. repel
    force or drive back
    Gold particles carry a slight negative charge, so they repel one another. Nature (Mar 13, 2013)
  13. attract
    direct toward oneself by means of desirable attributes
    A positive and negatively charged elerctice charge will attract one eachother.
  14. particle
    (nontechnical usage) a tiny piece of anything
    The crew had spotted particles of ammonia drifting away from the laboratory on Thursday.
  15. alpha decay
    radioactive decay of an atomic nucleus that is accompanied by the emission of an alpha particle
    In Alpha decay, the nuclues ejects two pronton and two nuetrons.
  16. beta decay
    radioactive decay of an atomic nucleus that is accompanied by the emission of a beta particle
    Beta decay occurs when a nuetron in the nucleus splits into a proton and and an electron
  17. element
    a substance that cannot be separated into simpler substances
    Those elements thrive through rapid mixing, just as they do in a natural biological system. Forbes (May 20, 2013)
  18. orbit
    the path of a celestial body in its revolution about another
    But astronomers have found few planets orbiting stars in clusters.
  19. gravity
    the force of attraction between all masses in the universe
    He discovered gravity and the principles governing motion, light, and cooling. Salon (May 11, 2013)
Created on Mon May 20 09:35:25 EDT 2013 (updated Wed Jan 08 11:11:05 EST 2014)

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