Grade 8 Science Marking Period 1

Valentine T. (United States of America)
54 words 0 learners

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Full list of words from this list:

words only definitions & notes
  1. atom
    the smallest component of an element
  2. electron
    an elementary particle with negative charge
  3. nucleus
    a part of the cell responsible for growth and reproduction
  4. atomic number
    quantity of protons in the nucleus of an atom of an element
  5. isotope
    atom with same atomic number, different number of neutrons
  6. mass number
    the sum of the number of neutrons and protons in an atomic nucleus
  7. theory
    a well-substantiated explanation of some aspect of the world
  8. atomic mass
    the property of an atom that causes it to have weight
  9. periodic table
    arrangement of chemical elements according to atomic number
  10. period
    the interval to complete one cycle of a repeating phenomenon
  11. group
    any number of entities (members) considered as a unit
  12. representation
    standing in for someone and speaking on their behalf
  13. compound
    a whole formed by a union of two or more elements or parts
  14. valence electron
    an electron in the outer shell of an atom which can combine with other atoms to form molecules
  15. reactive
    participating in processes changing substances into others
  16. malleable
    capable of being shaped or bent
  17. ductile
    capable of being shaped or bent or drawn out
  18. luster
    the property of something that shines with reflected light
  19. semiconductor
    a substance as germanium or silicon whose electrical conductivity is intermediate between that of a metal and an insulator; its conductivity increases with temperature and in the presence of impurities
  20. interpretation
    the act of expressing something in an artistic performance
  21. transfer
    move from one place to another
  22. ion
    a particle that is electrically charged positive or negative
  23. ionic bond
    a chemical bond between oppositely charged ions
  24. covalent bond
    a chemical bond that involves sharing a pair of electrons between atoms in a molecule
  25. molecule
    the simplest structural unit of an element or compound
  26. component
    one of the individual parts making up a larger entity
  27. acid
    a sour water-soluble compound with a pH of less than 7
  28. corrosive
    capable of destroying or eating away by chemical action
  29. indicator
    a device for showing the operating condition of some system
  30. base
    a compound reacting with an acid to form a salt and water
  31. neutralization
    action intended to nullify the effects of some action
  32. salt
    white crystalline form of especially sodium chloride used to season and preserve food
  33. process
    a particular course of action intended to achieve a result
  34. mixture
    a collection containing a variety of sorts of things
  35. colloid
    a mixture with properties between those of a solution and fine suspension
  36. suspension
    a mixture in which fine particles are supported by buoyancy
  37. solution
    a homogeneous mixture of two or more substances
  38. solvent
    a liquid substance capable of dissolving other substances
  39. solute
    the dissolved matter in a homogenous liquid mixture
  40. solubility
    the quality of being easily dissolved in liquid
  41. dissolve
    pass into a solution
  42. physical change
    a change from one state (solid or liquid or gas) to another without a change in chemical composition
  43. chemical change
    process determined by substances' composition and structure
  44. reactant
    a substance that is altered during a chemical process
  45. product
    a quantity obtained by multiplication
  46. exothermic reaction
    a chemical reaction accompanied by the evolution of heat
  47. endothermic reaction
    a chemical reaction accompanied by the absorption of heat
  48. rate
    a quantity considered as a proportion of another quantity
  49. law of conservation of mass
    a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system
  50. decomposition
    the organic phenomenon of rotting
  51. synthetic
    a compound made artificially by chemical reactions
  52. natural resource
    material in the environment that can be used by people
  53. polymer
    a naturally occurring or synthetic compound
  54. replicate
    reproduce or make an exact copy of
Created on Thu May 06 15:21:00 EDT 2021

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