Matter Unit

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Across
  1. 1. A change that involves only the physical properties of a substance.Results in a change in the form of a substance but not its identity or composition.
  2. 4. Anything that has mass and occupies space (i.e., has a volume).
  3. 5. The direct transition of particles from the solid phase to the gas phase; transition does not pass through the liquid phase.
  4. 6. The ability of particles to move closer together as pressure is applied.
  5. 7. (particulate level) Level of individual particles that make up all matter – level of atoms and molecules. Represented by molecular diagrams such as the one shown below for water.
  6. 9. A form of matter that cannot be separated into two different species by any physical method; has a unique set of properties and definite composition.
  7. 10. A process that absorbs energy in the form of heat from the surroundings.
  8. 12. A transition of particles from the liquid phase to the gas phase.
  9. 13. The energy that an object has because of its position, shape, or condition of the object.
  10. 16. The transition of particles from the gas phase to the liquid phase.
  11. 17. The smallest unit of a compound that keeps the composition and properties of that compound.
  12. 18. Measure of the average kinetic energy (KE) of the particles in an object. Proportional to the average KE of the particles in an object.
  13. 19. 1.All matter is made of particles that are in constant motion. 2.The faster the particles move, the higher the temperature of the substance. 3.At the same temperature, more massive particles move slower than less massive particles.
  14. 25. Energy of motion.
  15. 27. A measure of the quantity of matter in an object.
  16. 28. The measure of the space occupied by an object. Units of milliliters (mL) and liter (L) for liquids in the laboratory. Units of cubic centimeters (cm3) for solids in the laboratory.
  17. 29. Different phases (forms) in which matter can exist - solid, liquid, gas, plasma
  18. 31. The phase of matter in which a substance has a variable shape and a variable volume.
  19. 32. The phase of matter in which a substance has a variable shape and a definite volume.
  20. 34. A plot (graph) of temperature versus time when a system is cooled.
  21. 37. Describes the gaseous state of a substance that is a liquid or solid at room temperature.
  22. 38. Matter that is composed of two or more kinds of atoms chemically combined in definite (fixed) proportion by mass. A substance with definite composition that can be broken down into elements by chemical processes.
  23. 39. A change in the form of a substance.Does not change the identity or composition of the substance.
  24. 40. A transition of particles from the liquid phase to the gas phase.
Down
  1. 1. Properties of a substance that can be observed and measured without changing the identity or composition of the substance.
  2. 2. The temperature and pressure at which a solid becomes a liquid.
  3. 3. Matter can neither be created nor destroyed.
  4. 8. The phase of matter in which a substance has both definite shape and a definite volume.
  5. 11. The capacity to do work.
  6. 12. The temperature and pressure at which a liquid becomes a gas.
  7. 14. The temperature and pressure at which a liquid becomes a solid.
  8. 15. The direct transition of particles from the gas phase to the solid phase; transition does not pass through the liquid phase.
  9. 20. (human level) Level of matter large enough to be seen, handled and measured.
  10. 21. The smallest particle of an element that maintains the properties of the element.
  11. 22. (graph) of emperature versus time when a substance is heated.
  12. 23. A transition of particles from the solid phase to the liquid phase.
  13. 24. Total kinetic energy of all the particles in a substance. Proportional to sample size at the same temperature, i.e., the larger the sample size the greater the total amount of kinetic energy.
  14. 26. The simplest form of matter that is composed of only one type of atom. A substance that cannot be separated or broken down into simpler substances by chemical or physical means.
  15. 30. A state of matter in which the particles are free to move past one another (flow).
  16. 33. The phase of matter made of electrically charged particles that is able to conduct electricity.Has a variable shape and a variable volume.
  17. 35. A process that releases energy in the form of heat to the surroundings.
  18. 36. A transition of particles from the liquid phase to the solid phase.