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100 Project Ideas (page 2)

By — John Wiley & Sons, Inc.
Updated on Feb 15, 2011

Biology

  1. What effect does gender have on the rate of eye blinking?
      Independent variable: Gender
      Dependent variable: Rate of eye blinking
  2. What effect does age have on the rate of eye blinking?
      Independent variable: Age
      Dependent variable: Rate of eye blinking
  3. What effect does air temperature have on ant activity near an anthill entrance?
      Independent variable: Air temperature
      Dependent variable: Ant activity
  4. How does the age of a plant leaf affect the leaf's size?
      Independent variable: Leaf age
      Dependent variable: Leaf size
  5. How does the type of plant (monocot or dicot) affect the pattern of leaf veins?
      Independent variable: Plant type—monocot or dicot
      Dependent variable: Vein pattern in leaves
  6. What effect does the location of water have on the direction of plant root growth?
      Independent variable: Location of water
      Dependent variable: Direction of plant root growth
  7. What effect does the amount of sunlight have on the rate of chlorosis in grass?
      Independent variable: Amount of sunlight
      Dependent variable: Rate of chlorosis in grass
  8. What effect does water pH have on the growth of the water plant elodea?
      Independent variable: Water pH
      Dependent variable: Growth of elodea
  9. What effect does the amount of sunlight have on the growth of elodea?
      Independent variable: Amount of sunlight
      Dependent variable: Growth of elodea
  10. How does temperature affect the blooming of a flower?
      Independent variable: Temperature
      Dependent variable: Flower blooming
  11. How does the amount of light affect the blooming of a flower?
      Independent variable: Amount of light
      Dependent variable: Flower blooming
  12. What effect does wind have on the rate of transpiration?
      Independent variable: Amount of wind
      Dependent variable: Rate of transpiration
  13. What effect does cigarette tobacco in soil have on plant growth?
      Independent variable: Amount of cigarette tobacco in soil
      Dependent variable: Plant growth
  14. Which paper found around the house has the fastest rate of biodegradability?
      Independent variable: Type of paper
      Dependent variable: Rate of biodegradability
  15. What effect does the color of paper have on its rate of biodegradability?
      Independent variable: Color of paper
      Dependent variable: Rate of biodegradability
  16. How does temperature affect the rate at which fruit ripens?
      Independent variable: Temperature
      Dependent variable: Rate of fruit ripening
  17. How does light affect the rate at which fruit ripens?
      Independent variable: Light
      Dependent variable: Rate of fruit ripening
  18. How does ethylene gas affect the rate at which fruit ripens?
      Independent variable: Ethylene gas
      Dependent variable: Rate of fruit ripening
  19. What relationship is there between hair color and eye color?
      Independent variable: Hair color
      Dependent variable: Eye color
  20. What relationship is there between hair color and skin freckles?
      Independent variable: Hair color
      Dependent variable: Skin freckles
  21. How similar are the fingerprints of siblings?
      Independent variable: Siblings
      Dependent variable: Fingerprints
  22. What effect does the period of time an eye is closed have on its pupil size?
      Independent variable: Time eye is closed
      Dependent variable: Pupil size
  23. How does temperature affect the rate of insect metamorphosis?
      Independent variable: Temperature
      Dependent variable: Rate of metamorphosis
  24. What effect does gender have on the sense of smell?
      Independent variable: Gender
      Dependent variable: Sense of smell
  25. What effect does age have on the sense of smell?
      Independent variable: Age
      Dependent variable: Sense of smell
  26. What effect does age have on the sense of touch?
      Independent variable: Age
      Dependent variable: Sense of touch
  27. What effect does gender have on the sense of touch?
      Independent variable: Gender
      Dependent variable: Sense of touch

Chemistry

  1. What effect does the type of solute have on the rate of crystallization?
      Independent variable: Type of solute
      Dependent variable: Rate of crystallization
  2. What effect does the temperature of a solution have on the rate of crystallization?
      Independent variable: Temperature of a solution
      Dependent variable: Rate of crystallization
  3. During crystallization, what effect does the rate of evaporation have on the size of crystals formed?
      Independent variable: Rate of evaporation
      Dependent variable: Crystal size
  4. How does the pH of water affect the rate of the rusting of iron?
      Independent variable: Water pH
      Dependent variable: Rate of rusting
  5. What effect does exercise have on the production of carbon dioxide in humans?
      Independent variable: Exercise
      Dependent variable: Carbon dioxide production
  6. What is the effect of salt on the freezing point of water?
      Independent variable: Amount of salt
      Dependent variable: Freezing point of water
  7. What effect does the type of solute have on degree of solubility?
      Independent variable: Type of solute
      Dependent variable: Degree of solubility (measured by the amount of solute that can be dissolved in a specific amount of solvent)

Earth Science

  1. What effect does the amount of ground cover have on soil concentration in runoff?
      Independent variable: Amount of ground cover
      Dependent variable: Soil concentration in runoff
  2. What effect does the type of ground cover have on soil concentration in runoff?
      Independent variable: Type of ground cover
      Dependent variable: Soil concentration in runoff
  3. What effect does plant density have on soil erosion?
      Independent variable: Plant density
      Dependent variable: Soil erosion
  4. What effect do the type of plant roots have on soil erosion?
      Independent variable: Type of plant roots
      Dependent variable: Soil erosion
  5. How does the mixture of mineral solutions affect crystal growth?
      Independent variable: Mixture of solutions
      Dependent variable: Crystal growth
  6. How does soil color affect the cooling of land?
      Independent variable: Soil color
      Dependent variable: Temperature change of the soil
  7. What effect does the Sun's sky position have on air temperature?
      Independent variable: Sun's sky position (determined by time measured in hours)
      Dependent variable: Air temperature
  8. How does the difference between land and water temperature affect the direction of wind?
      Independent variable: Temperature difference between land and water
      Dependent variable: Wind direction
  9. How does the depth of water affect the altitude of water waves?
      Independent variable: Depth of water
      Dependent variable: Altitude of water waves
  10. How does wind direction affect direction of surface currents?
      Independent variable: Wind direction
      Dependent variable: Current direction
  11. What effect does the concentration of dust particles have on sky color?
      Independent variable: Dust particle concentration
      Dependent variable: Sky color
  12. What effect does dust particle size have on sky color?
      Independent variable: Dust particle size
      Dependent variable: Sky color
  13. How does air pressure affect the type of clouds formed?
      Independent variable: Air pressure
      Dependent variable: Cloud type
  14. How does air temperature affect the type of clouds formed?
      Independent variable: Air temperature
      Dependent variable: Cloud type
  15. What effect does wind speed have on the type of clouds formed?
      Independent variable: Wind speed
      Dependent variable: Cloud type
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