SOME SUGGESTIONS FOR SCIENCE FAIR INVESTIGATIONS:
1. What is the effect of wind on the amount of water that a plant needs? (Biological Science)
2. How can you get kidney beans to grow fastest? (Biological Science)
3. How can you affect the shape of a magnetic field? (Physical Science)
4. How high do you have to raise a smooth board to get a block to slide down it? How does covering the block with felt or sandpaper or other materials affect that height? How does changing the weight of the block affect height? (Physical Science)
5. What affects how fast an ice cube melts in air? How many ways can you get it to melt faster than it does in air at room temperature? (Physical Science)
6. What are the effects of detergent on water? (Physical Science)
7. Which magnifies newsprint more – clear water drop or a soapy water drop? (Physical Science)
8. What is the biggest shadow you can make with a piece of paper 8 ½ inches by 11 inches? What is the smallest shadow you can make with the same piece of paper? (Physical Science)
9. What is the effect of turning young plants upside down as they grow? (Biological Science)
10. How can you get seeds to germinate fastest? (Biological Science)
11. Which seeds germinate fastest? Do little seeds germinate faster than big seeds? (Biological Science)
12. What species of seedling can survive longest in just damp cotton wool in the dark? (Biological Science)
13. Does a water-pick clean your teeth better than a standard toothbrush? (Biological Science)
14. How do different deodorants affect skin and clothes? (Biological Science or Physical Science)
15. What is the fastest way to cool a cup of hot water? (Physical Science)
16. How can you grow the biggest crystals of alum? (Physical Science)
17. How does light affect plants?
18. Do sweet, salt, and bitter substances taste the same to everyone?
19. How can you affect the time it takes for bread to rise?
20. What happens when you soak egg shells in vinegar? What about when you soak them in lemon juice or other kitchen chemicals? (Physical Science)
21. What kind of fruit rots fastest?
22. Do plants grow faster if you talk (or sing) to them regularly? (Biological Science)
23. Do people who play sports regularly have the same heart rate as people who don’t? Do sports people recover from exercise more quickly than less active people? (Biological Science)
24. Will seeds sprout faster in soil or in a plastic bag with damp cotton wool? (Biological Science)
27. Which gum keeps its flavor the longest? Which blows the best bubbles? What is most stretchy? Which loses the most weight after you chew it? (The weight lost is the sugar your saliva dissolved away.)
28. How can you make suds last longest? Compare shampoo to dish-washing detergent. Compare different brands of shampoo to each other and different brands of dish-washing detergent to each other. (Physical Science)
29. Investigate all the different effects of static electricity. What is the effect of static electricity on paper, plastic, different kinds of breakfast cereal? (Physical Science)
30. Which brand of paper towel stays strongest when wet? (Physical Science)
31. Which freezes fastest - Coke, Kool-Aid, strong salt water, or weak salt water? (Physical Science)
32. How can you stop cut apples from going brown? (Biological Science)
33. What mixtures will a filter separate? (Physical Science)
34. How can you make the best cup phones? (Physical Science)
35. How do lenses and pieces of glass bend light? What else can bend light? (Physical Science)
36. What is the best way to keep steel from rusting? (Physical Science)
37. Which filtering systems work best to clean dirty water? (Physical Science)
38. How does the color of light affect plant growth? (Biological Science)
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40.How does temperature influence yeast cell reproduction? (Biological Science)
41. How does the angle of an inclined plane affect the work to lift an object? (Physical Science)
42. Which surfaces provide the least amount of friction? (Physical Science)
43. Which fruit and vegetable juices make good indicators for acids and bases? (Physical Science)
44. How does water depth affect water pressure? (Physical Science)
45. Which materials insulate best against the cold? (Physical Science)
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52. Which materials conduct electricity? Try different kinds of liquids too. (Physical Science)
53. How does the shape of a reflective surface affect the reflection of light? (Physical Science)
54. What is the relationship between magnification and the focal point of a lens? (Physical Science)
55. Does the color of a container affect the amount of light energy absorbed? (Physical Science)
56. How do offspring reflect parents’ traits? (Biological Science)
57. What part(s) of a plant can be used to propagate a plant? (Biological Science)
58. Which design of paper plane will fly the furthest? (Physical Science)
59. Who can react faster to a bell - children or adults? (Biological Science)
60. Can people identify different kinds of Kool-Aid by taste alone? (Biological Science)
61. What is the effect of detergent on the life in pond water? (Use containers of pond water – don’t pollute a pond.) (Biological Science)
62. What effect does salt have on the properties of water? (Example: Acidity lathering ability with soap, dissolving ability of sugar, freezing and boiling points.) (Physical Science)
63. What affects the success of making sponge cake? (Physical Science)