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Science Fair Topics
2. Determining the Empirical Formula of Potassium Chlorate through Thermal Decomposition
6. How effective are natural mosquito repellents?
7. Does light affect the rates at which foods spoil?
8. Do all dishwashing detergents produce the same amount of bubbles? Clean the same
9. Is bottled water more pure than tap water?
10. How does the pH of juice change with time? How does temperature affect the rate of
11. What conditions affect the ripening of fruit? Look at ethylene and enclosing a fruit in a
sealed bag, temperature, light, or nearness to other pieces or fruit. 12. What is the effect of a chemical on a plant? Factors that you can measure include rate of
plant growth, leaf size, life/death of the plant, color of plant, and ability to flower/bear 13. How do pollutants affect marine life?
14. Effectiveness of garlic in fighting bacteria.
15. The effect of salt and sugar on the freezing point of water.
16. Electrolysis.
17. Investigate the role of enzymes and yeast in the fermentation or cheese-making process.
18. Can you grow plants without planting them in soil?
19. What are the different methods of testing water pollution?
20. How is paper recycled and what are its uses?
21. Does presence of preservatives in food help to preserve foods longer? What if foods don't
22. How much weight can the surface tension of water hold?
23. A Silver-Cleaning Battery.
24. Are Enzymes in Laundry Detergents Effective Stain Removers?
25. From Dull to Dazzling: Using Pennies to Test How pH Affects Copper Corrosion.
26. Electrolyte Challenge: Orange Juice Vs. Sports Drink.
27. Measuring Enzyme Activity: Yeast Catalase.
28. Turn Milk into Plastic.
29. Candy Chromatography: What Makes Those Colors?
30. Can Water Float on Water?
31. Measuring the Humidity and how it effects on metals.
32. Single displacement reaction in metals
33. Is soil a type of electrical system?
34. Does magnetism affect the growth of plants?
35. How do different fertilizers affect the way plants grow? There are lots of different types
of fertilizers, containing varying amounts of nitrogen, phosphorus, and potassium, in addition to other ingredients. You can test different fertilizers and see how they affect the height of a plant, the number or size of its leaves, the number of flowers, time until blooming, branching of stems, root development, or other factors. 36. The effect of temperature and Air exposure on the ascorbic acid content of orange juice
37. Investigate the different effects of chlorine, pH, acid, alkalinity, and water hardness on
38. Absorption of pollutants and pesticides in different soil types.
39. Determine what natural insecticide is most effective against crickets.
40. Effects of sugar and caffeine on heart rate.
41. See if you can collect carbon dioxide from soda pop (Pepsi), yeast mixed with sugar and
water, and a chemical reaction, which is made from baking soda and vinegar. 42. How temperature affects the amount of carbon dioxide in carbonated beverages?
43. How is the conductivity of distilled water affected when substances such as salt, sugar,
44. Build a basic fuel cell using salt water, batteries, and a platinum wire.
45. Find out if plants really absorb water by osmotic pressure.
46. Why does acid rain destroy buildings and pavements?
47. Determine what material, when commonly burned, gives off the most black carbon particulates
48. Which antacid can neutralize the most stomach acid?
49. Compare natural antacids with chemical antacids.
50. The Effect of Various Milk Pasteurization Temperatures on Bacteria Growth.
51. The Effect of Various Temperatures on the Type and Growth Rate of Bacteria in Meat.
52. Does temperature affect the output voltage or current of a dry cell battery?
53. Which battery works better? Alkaline, lithium, heavy duty, nickel cadmium, or nickel
54. Reducing the Flammability of Paint.
55. Dry Cleaning vs. Wet Cleaning.
56. How permanent are permanent markers?
57. The Effect of Voltage on Copper Electroplating.
58. Factors (temperature, pH, enzyme concentration) affecting catalyzes and their effects
59. The Effect of Various Antioxidants on Apple Browning.
60. Compare the antioxidant effects of natural and synthetic food preservatives.
61. Global Warming or Global Cooling?
62. Alternative materials to substitute the synthetic plastics and paper.
63. Separating mixtures with static electricity.
64. Can people tell if water is clean by looking at it?
65. Investigate tap water safety.
66. Electroplating: Copper-Plated Key.
67. How to test the pH of the Soil.
68. How to Make a Fire Extinguisher.
69. How to make Invisible Inks.
70. Bouncy Polymer Chemistry, how can you make your own fun toy.
71. Make Your Own Markers.
72. Are Enzymes in Laundry Detergents Effective Stain Removers?
73. Measuring the Amount of Acid in Vinegar by Titration with an Indicator Solution.
74. Salt Bridge Over Electrified Waters: How Electricity Changes pH.

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