Lesson 3.1

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Across
  1. 1. property A characteristic that describes how a substance behaves during a chemical reaction.
  2. 4. Metals that do not contain iron.
  3. 6. reaction A process where substances change into new substances.
  4. 7. How much mass is packed into a given volume.
  5. 9. bond A bond where atoms share electrons.
  6. 11. The ability of a material to attract or repel other magnets.
  7. 12. A pure substance made of only one kind of atom.
  8. 16. A lightweight, silvery metal that resists corrosion.
  9. 17. A unit that measures electrical potential or “pushing force” in a circuit.
  10. 19. To heat a metal and let it cool slowly to make it softer and easier to shape.
  11. 22. A substance that conducts electricity when dissolved in water.
  12. 25. reaction When two different metals touch in the presence of an electrolyte and one corrodes faster.
  13. 26. An alloy of iron and carbon.
  14. 27. replacement reaction A reaction where one element replaces another in a compound.
  15. 31. A chemical reaction where a material combines with oxygen.
  16. 32. How much a material opposes the flow of electricity.
  17. 34. property A characteristic that can be observed without changing the substance (color, density, melting point).
  18. 38. A mixture of two or more metals (or a metal and another element).
  19. 39. The gradual destruction of a material (usually metal) by chemical reactions, often rusting.
  20. 40. How easily a material can be hammered or shaped without breaking.
  21. 42. Reheating hardened steel to reduce brittleness and improve toughness.
  22. 44. Able to return to its original shape after being stretched or bent.
Down
  1. 2. A light metal that burns easily with a bright white flame.
  2. 3. A strong, common metal used to make steel.
  3. 5. The negative electrode in an electrical or chemical cell.
  4. 6. A reddish metal that conducts electricity very well.
  5. 7. How easily a material can be drawn into wires.
  6. 8. expansion How materials expand when heated.
  7. 10. Containing iron.
  8. 11. Two or more atoms bonded together.
  9. 13. The positive electrode in an electrical or chemical cell.
  10. 14. steel Steel with chromium that resists rusting.
  11. 15. strength How much stretching force a material can withstand before breaking.
  12. 18. A material’s resistance to being scratched or dented.
  13. 20. A metal often used to coat steel to protect it from rusting.
  14. 21. property How a material behaves under forces (hardness, strength, ductility, etc.).
  15. 23. conductivity How well a material transfers heat.
  16. 24. Heating and cooling a metal to make it stronger and harder.
  17. 28. An atom or molecule with an electrical charge.
  18. 29. carbon steel Steel with little carbon, making it softer, more ductile, and easier to shape.
  19. 30. carbon steel Steel with a high amount of carbon, making it strong and hard but less ductile.
  20. 33. How well a material carries heat or electricity.
  21. 35. The smallest unit of an element that still has that element’s properties.
  22. 36. How easily a material breaks instead of bending.
  23. 37. The amount of space an object occupies.
  24. 41. A shiny, conductive material that can be shaped and formed easily.
  25. 43. The amount of matter in an object.
  26. 45. A substance made of two or more elements chemically joined together.