Science:8th grade-physical change

amanda P. (United States of America)
12 words 25 learners

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Full list of words from this list:

words only definitions & notes
  1. chemical change
    process determined by substances' composition and structure
    Chemical change: The substances present at the beginning of the change are not present at the end; new substances are formed.
  2. chemical reaction
    a process in which substances are changed into others
    This indicates they did not undergo a chemical reaction.
  3. microscopic
    so small as to be invisible without a magnifying device
    What are the macroscopic and microscopic differences between physical and chemical changes?
  4. chemical
    produced by reactions involving atomic or molecular changes
    Chemical change: The substances present at the beginning of the change are not present at the end; new substances are formed.
  5. evaporate
    change into gas or steam
    Water evaporates from the surface of the ocean.
  6. particle
    (nontechnical usage) a tiny piece of anything
    The particles of the substance are rearranged.
  7. physical
    involving the body as distinguished from the mind or spirit
    Physical change: Although some extensive properties (like shape, phase, etc.) of the material change, the material itself is the same before and after the change.
  8. atom
    the smallest component of an element
    The particles of the substance are broken apart, and the atoms are rearranged into new particles, forming a new substance.
  9. molecule
    the simplest structural unit of an element or compound
    There is no such thing as a brass molecule.
  10. reaction
    an idea evoked by some experience
    This indicates they did not undergo a chemical reaction.
  11. component
    one of the individual parts making up a larger entity
    The creation of a metal alloy: If we melt two types of metal together, we create an alloy metal that has different properties than either of its components (e.g., heat conductivity, electrical conductivity, density, etc.).
  12. electrical
    relating to or concerned with electricity
    The creation of a metal alloy: If we melt two types of metal together, we create an alloy metal that has different properties than either of its components (e.g., heat conductivity, electrical conductivity, density, etc.).
Created on 二月 3, 2011

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