Across
- 2. Term for a homogenous mixture.
- 4. System in which energy is exchanged with the environment but matter is not.
- 7. Change that causes atoms (reactants) to rearrange and form new substances (products) with different properties.
- 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).
- 13. Another name for a gaseous state.
- 16. Material that can be separated by physical means into two or more substances.
- 17. Form of energy that flows between samples of matter because of their differences in temperature (moves from hot to cold bodies).
- 19. A substance that cannot be broken down into simpler substances by any (chemical or physical) process.
- 20. Transition from a gaseous state of matter to a liquid state of matter.
- 23. The basic unit (smallest part) of an element.
Down
- 1. Transition from a solid state of matter to a liquid state of matter.
- 2. Phenomena that are too small to see with an ordinary light microscope (e.g. atoms, molecules).
- 3. Kind of matter composed of a single element or compound that cannot be separated into other kinds of matter by any physical process.
- 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.
- 6. Measure of the average kinetic energy of the particles in a substance.
- 8. State of matter in which particles vibrate about a fixed point, but do not have translational movement.
- 10. Term used to describe mixtures that are not uniform throughout (i.e. mixtures that have visibly distinguishable parts such as layers).
- 11. Can be classified as elements, compounds or mixtures.
- 12. State of mater characterized as having a fixed volume and an indefinite shape.
- 14. A change in the form of a substance, but not in the composition of that substance.
- 15. Collection of parts or processes interacting in ways that produce a new entity, property or function.
- 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.
- 21. Term used to describe a molecule that contains two atoms.
- 22. Atom or group of atoms that has a net positive or negative charge.