Chemistry Project

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Across
  1. 4. / A substance which can't be further divided into simpler substances like chemical methods.
  2. 7. Fuel / It is form from the buried remains of plants and animals.
  3. 10. Cycle / The system by which nitrogen and its compound are interchanged.
  4. 11. / Substance which increases the rate of a chemical reaction.
  5. 15. / When liquid changes to gas.
  6. 17. / Atom of the same element which have different numbers of neutrons in their nuclei.
  7. 18. / A substance formed by the chemical combination of two or more elements in fixed proportions.
  8. 23. / Toxic metal that can cause learning difficulties in children.
  9. 24. / Creator of the periodic table.
  10. 27. / A state of matter that doesn't have a fix volume.
  11. 28. / U.
  12. 30. / Paper ________ was used to separate solutions of coloured substance.
  13. 35. / Zr.
  14. 36. / Harmful effect of human activity and waste.
  15. 37. / A word used to describe the property that metals that can be drawn out and stretched into wires.
  16. 40. / Separating a liquid from a solution.
  17. 41. / Composes 21% of the atmosphere.
  18. 42. / P.
  19. 44. / A state of matter that has a definite shape.
  20. 45. / A subatomic particle that is located in energy levels outside the nucleus.
  21. 47. / Type of rock that cover three - quarters of the land surface.
  22. 49. / A type of chemical reaction where a compound breaks down into simpler substances.
  23. 50. / Changes of physical state from solid to liquid.
  24. 52. / A chemical reaction in which a compound is made from its elements.
  25. 54. / A direct change of state from solid to gas or gas to solid.
  26. 55. / Semi-metal.
  27. 57. / The solid substance that has dissolve in liquid to form a solution.
  28. 58. / Substance that can be used as a source of energy.
Down
  1. 1. / A common natural gas that is contain in your fart.
  2. 2. / The liquid that dissolves the solid solute to form a solution.
  3. 3. / First element in the periodic table.
  4. 5. / A class of chemical element which have a characteristic shiny appearance and are good conductors of heat and electricity.
  5. 6. / Sources of energy and other resources which cannot run out.
  6. 7. / Changes of physical state from liquid to solid.
  7. 8. / Source of life.
  8. 9. / Mixtures of elements design to have the properties useful for a particular purpose.
  9. 12. / The ________ is measured by a thermometer.
  10. 13. - Metal / A class of chemical element that are typically poor conductors of heat and electricity.
  11. 14. Cycle / Natural cycle by which rocks are possibly changed into another type of rock by conditions of temperature and pressure.
  12. 16. Rain / Rain which has been made more acidic than normal.
  13. 19. / A word used to describe the property that metals can be bend and beaten into sheets.
  14. 20. / A vertical column of the periodic table containing elements with similar properties.
  15. 21. / A horizontal row of the periodic table.
  16. 22. / A from of calcium carbonate (CaCO3)
  17. 25. / H20
  18. 26. / Our favorite food ;)
  19. 29. / Most reactive group of non-metals.
  20. 31. / Materials we get from the environment to meet our needs.
  21. 32. / _________ is the process in which plants take in C02 and convert it to sugar.
  22. 33. / Liquéfaction.
  23. 34. / Xe
  24. 38. / A process in which heat energy is produced and released to the surrounding.
  25. 39. / The separation of a solid from a liquid, using a fine filter paper which does not allow the solid to pass through.
  26. 43. / Type of rock form by heat and pressure changing existing rocks.
  27. 46. Dioxide / Composes 0.04% of the atmosphere.
  28. 48. / Seawater is made drinkable by ________.
  29. 51. / Water is a type of this state of matter.
  30. 53. / Type of rock form by solidification of melted minerals.
  31. 55. / Anything which occupies space and has mass.
  32. 56. / NH3