Modeling Matter

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Across
  1. 2. Term for a homogenous mixture.
  2. 4. System in which energy is exchanged with the environment but matter is not.
  3. 7. Change that causes atoms (reactants) to rearrange and form new substances (products) with different properties.
  4. 9. Symbolic representation of a molecule in which the symbols for the elements are used to indicate the types of atoms present and subscripts are used to show the relative numbers of atoms (e.g. H2O2,C5H12).
  5. 13. Another name for a gaseous state.
  6. 16. Material that can be separated by physical means into two or more substances.
  7. 17. Form of energy that flows between samples of matter because of their differences in temperature (moves from hot to cold bodies).
  8. 19. A substance that cannot be broken down into simpler substances by any (chemical or physical) process.
  9. 20. Transition from a gaseous state of matter to a liquid state of matter.
  10. 23. The basic unit (smallest part) of an element.
Down
  1. 1. Transition from a solid state of matter to a liquid state of matter.
  2. 2. Phenomena that are too small to see with an ordinary light microscope (e.g. atoms, molecules).
  3. 3. Kind of matter composed of a single element or compound that cannot be separated into other kinds of matter by any physical process.
  4. 5. Representation of an object, process, or phenomenon that looks like, functions like, describes or explains the real thing. An alternative definition could be a set of assumptions put forth to explain the observed behavior of matter.
  5. 6. Measure of the average kinetic energy of the particles in a substance.
  6. 8. State of matter in which particles vibrate about a fixed point, but do not have translational movement.
  7. 10. Term used to describe mixtures that are not uniform throughout (i.e. mixtures that have visibly distinguishable parts such as layers).
  8. 11. Can be classified as elements, compounds or mixtures.
  9. 12. State of mater characterized as having a fixed volume and an indefinite shape.
  10. 14. A change in the form of a substance, but not in the composition of that substance.
  11. 15. Collection of parts or processes interacting in ways that produce a new entity, property or function.
  12. 18. A substance with constant composition that can be broken down into elements by chemical processes. It may also be defined as a molecule that contains more than one type of element.
  13. 21. Term used to describe a molecule that contains two atoms.
  14. 22. Atom or group of atoms that has a net positive or negative charge.