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Science Experiments for Class 7

Students in the seventh grade can acquire in-depth knowledge about elementary concepts in Science by carrying out some of these easy-to-do projects and experiments at home or in the school. These experiments will help them understand how best to apply theoretical principles and ideas to real world objects and applications.

  1. Making a Bell System using an electromagnet, battery, some insulated copper wire and a steel pin or nail.
  2. A Chemical Change: perform varieties of experiments that can study and show chemical changes.
  3. A Crystal Radio Set: to make a radio that does not need electricity and only uses the energy of electromagnetic radio waves.
  4. Heat can produce electricity: purpose of this project is to understand energy and possible ways of converting it from one form to another.
  5. Testing relationship between eye color and sight
  6. Acceleration on an inclined plane
  7. The Effect of Various Wind Speeds and Blade Factors on Energy / Voltage Output [
  8. Temperature effects on the energy developed by a solar panel
  9. Effects of Angle of Solar Cells Towards the Sun on Electrical Power Generated
  10. Will the use of lenses improve the efficiency of a solar panel?
  11. What is the effect of light on a plants growth?
  12. What is the effect of salt water on a plant’s growth?
  13. Effect of sugar water on a plants growth
  14. Effect of Human Activity on Water Quality and Stream Pollution
  15. Effect of Development on Quality of water
  16. The Effect of Antifreeze on the Survival Rate and Growth of
  17. The effect of salinity on the survival rate of daphnia
  18. The Effect of Antifreeze on the Survival Rate of Daphnia pulex
  19. Does Fluoride Affect the Survival Rate of Daphnia?
  20. What is the effect of vinegar on plants?
  21. What is the effect of oil on plants?
  22. How to write a Secret Letter with Invisible Ink
  23. Carbon Dioxide and Man: to study the effects of carbon dioxide on the weather and temperature. You have to design and perform an experiment to simulate the green house effect to show how the increased levels of carbon dioxide can cause global warming.
  24. How Do You Test If The Egg Is Cooked?
  25. Making a Simple Electric Circuit
  26. How metals compare in density
  27. Egg Floatation: By changing the density of water you can make the egg float or submerge.
  28. How does the amount of oxygen affect the rate of burning?
  29. How do airplanes fly and what is the best wing shape?
  30. How do waves carry energy?
  31. How do magnets work?
  32. What limits the speed of a car, boat, or a truck?
  33. Can eggs withstand a greater force from one direction than from others?
  34. How strong is nylon fishing lines?
  35. Does the weather really affect mood?
  36. What is the Best Way to Disinfect a Toothbrush?
  37. How strong are plastic wraps?
  38. Which homemade airplane design flies best?
  39. What factors affect the bounce of a dropped ball?
  40. How do compression and tension make things strong?
  41. How to make a CD balloon hovercraft
  42. Making a lava lamp
  43. Rain cloud in a jar science experiment
  44. How is paint affected by temperature changes?
  45. Use of solar energy- design and construct solar cookers, solar panels, etc.
  46. Designing a strong bridge: design and perform experiments that can help you to decide how the design affects the strength of a bridge.
  47. Determine the accuracy of various thermometers
  48. Compare copper wires to optical fibers for transmitting sound, image or data.
  49. How does temperature affect the strength and adherence of glue?
  50. Effect of Acids on teeth, bones and eggs
  51. Chemical reactions that produce energy or require energy
  52. Testing of consumer products- glues, stain removers, antiseptics, mouthwash, detergents, paper towels
  53. Effects of sunlight on rubber, ink, paper etc
  54. Comparing the surface tension of various liquids
  55. Effects of salt and other contaminants on rate of rusting
  56. Growing crystals- factors that affect the rate and the size
  57. Testing connections between hair and eye color
  58. Determining the effects of various nutrients on plant growth
  59. How do the amounts of water affect plant growth?
  60. How do the hours of sunlight affect plant growth?
  61. What conditions are favorable for mushroom production?
  62. What conditions are favorable for algae growth?
  63. What conditions are favorable for bacteria growth and bacteria control?
  64. Demonstration of principals; how is current affected by type of conductor, temperature, filament, etc.
  65. Comparing materials and objects for conductivity
  66. The effects of phosphates on aquatic plants
  67. The effect of excess salinity on plants
  68. The effects of electromagnetic fields on plants
  69. Study of diffusion through cell membranes
  70. Growing plants and animals by cloning
  71. Study of air purification methods
  72. Efficient methods of breaking down crude oil in seawater
  73. Experimenting with microbial degradation of petroleum
  74. Experimenting with biodegradability
  75. Finding an ink that would decompose for recycling paper
  76. Comparison of the Effects of Inorganic Catalysts and Enzymes on Peroxide Decomposition
  77. Heat Content of Snack Foods
  78. Solubility and the Percent of Oil in Peanuts
  79. Design considerations for Solar Heated homes
  80. The effect of sleep amount on learning and academic performance
  81. Does aerobic exercise improve cognitive function?
  82. Does an electric toothbrush remove more plaque than a manual toothbrush?
  83. The effect of knowing class grade average on students’ performance
  84. Comparing the effects of footwear on postural shifts and stride lengths
  85. Investigating the effect of antibiotics on plant
  86. Temperature effect on mold growth
  87. What effect does the salicylic acid in the “pain relief” medicine aspirin have on the growth of plants?
  88. Creating an efficient cold pack using water and different types of fertilizers
  89. Are the inks of different markers and highlighters mixtures of the same colors?
  90. Determining the conductivity of different liquids
  91. Does an incandescent bulb produce more heat than a fluorescent bulb?
  92. Which battery works better: alkaline, lithium, nickel cadmium, or nickel metal hydride?
  93. Building a solar toy car
  94. Effect of the shape of towers on their strength
  95. Which treated wood can withstand a fire better?
  96. Effect of Turbidity on Dissolved Oxygen Levels of Water
  97. Effect of vegetation decay on water acidity
  98. How do oil spills affect plant growth?
  99. Determine the effects of different water pollutants on corn.
  100. Effects of different types of water on the growth of Soybeans

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