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