100 Science Fair Project Ideas

When I first began running science fairs, I struggled to help students come up with ideas. Not every idea is "science fair worthy". Some questions just aren't deep enough, leading to empty boards and confused students. Some questions aren't based in science, and others are just too vague to give a student meaningful direction. So, I've created this list to give students starting ideas for what they might be interested in exploring. Use these ideas directly or as a jumping-off point for students to tailor their own! 



A note about this list:

Remember that every science fair project needs a question and a hypothesis. Yes, even research projects! A hypothesis for a research project can be something based off of personal experience and prior knowledge, or formulated after some initial research. Some of the items on this list already have the question part covered, while others do not. So, for example, the topic of "The Bermuda Triangle" would need a specific question for the project, such as "is there a scientific explanation for the ships and planes that go missing in the Bermuda Triangle?"


Research Ideas


Space

  1. The Earth vs. Venus

  2. Black Holes

  3. Is terraforming on another planet possible?

  4. Is there other life in the universe?

  5. Alternate theories to the Big Bang

  6. Is it possible to colonize Mars?

  7. Is time travel possible?

  8. What is dark matter and energy?

  9. What is gravity?

  10. The future of the universe

  11. Why the Earth can’t be flat


    Technology

  12. How does wifi work?

  13. How do you build _______? (cell phone, computer, GPS, etc)

  14. Navigation: now vs 100 years ago

  15. How does GPS work?

  16. Solutions for the space junk problem

  17. How does AI work?

  18. How do self-driving cars work?

  19. How many people does it take to make a _______? (supply chain deep dive)

  20. How to live off grid

  21. What contributions did (choose a specific scientist or tech person) make?

  22. Can cars run on fuel sources other than gasoline?

  23. What is cryptocurrency and how does it work?

  24. How does the internet work?


    Earth Science

  25. How will the climate change in the next 20 years?

  26. What’s the deal with Radon gas? (this could include testing levels in their house)

  27. How do crystals form? (and how do different types differ)

  28. How to live a low-emission lifestyle

  29. Why do hurricanes happen? (or other natural disaster)

  30. How do eclipses work?

  31. The Bermuda Triangle

  32. What is the cleanest energy source? (hydroelectric, solar, wind, etc.)

  33. Electric vs. gas vehicles, which is better for the environment

  34. The Great Pacific Garbage Patch

  35. Asbestos (what is it/why is it bad/how to get rid of it)

  36. How much freshwater do we have left? (+what to do about it)

  37. The polar vortex: what is it and how does it affect climate?

  38. Environmental impact of AI

  39. The ozone layer

  40. How are synthetic oils made and are they better for the environment?

  41. How to decontaminate land (contamination from nuclear, chemical, oil, etc.)


    Biology/Health

  42. Genetic Modification: good or bad?

  43. The importance of bees (+ other pollinators)

  44. How to grow your own food (garden)

  45. Selective breeding (plants or animals)

  46. The long-term effects of Chernobyl

  47. Organic vs non-organic food

  48. Health effects of vapes

  49. Are cell phones bad for our health?

  50. The importance of sleep

  51. How does bioluminescence work?

  52. How to make a sealed terrarium or self-sustaining aquarium

  53. Epigenetics

  54. The importance of vaccines

  55. Hydroponics

  56. Effects on animals kept at a zoo

  57. What is CRISPR and how does it work?

  58. Effects of deforestation on humans and animals


    Math

  59. How is (specific math topic) used in life?

  60. How do social media algorithms work?

  61. Can a computer ever truly generate random numbers?

  62. How are passwords kept safe online? (or just computer security in general)

  63. How does the stock market work?

  64. The probability involved in poker/black jack or other card games

  65. The rubix cube algorithm

  66. How many number systems are there? (roman numeral, arabic, binary, etc)

  67. Is math a human invention or the language of the universe?

  68. Calculating carbon footprints


    Chemistry/Physics

  69. What are the northern lights?

  70. What makes a rainbow? (can include different types like double, numerary, etc)

  71. An exploration of particle physics

  72. Types of nuclear bombs and how they work (or gun or other explosives)

  73. How does dissolving work?

  74. Is radiation always bad?

  75. How do batteries work?

  76. The breakdown process of plastic

  77. In nuclear energy safe?

  78. Vehicle crash tests

  79. The Fukushima Nuclear Incident

  80. The theory of general relativity

  81. How can oil be separated from water? (ocean oil spills)

  82. How do noise-canceling headphones work?

  83. Is it possible to travel at the speed of light?

  84. The chemistry of household cleaners

  85. Breaking down the ingredients (pick a product like shampoo and explore each ingredient)


    Psychology

  86. Pick a specific psychological issue to research (schizophrenia, autism, epilepsy, ADHD, etc.)

  87. How do physical health and mental health connect?

  88. How do different drugs affect the brain?

  89. How were drugs used 100 years ago?

  90. How does society lose knowledge? (lost knowledge in history)

  91. How do we learn?

  92. Comparing brains (healthy vs. mentally ill, low intelligence vs high, serial killer vs good samaritan, etc.)

  93. Is IQ a legitimate way to test intelligence?

  94. Is there any validity to Myers-Briggs Personality types?

  95. Astrology: legit or not? (can be applied to any pseudoscientific topic)

  96. What is pseudoscience and how to spot it

  97. What does music do to the brain?

  98. How antidepressants (or other medications) affect the brain and body

  99. Ways to improve mental health

  100. Ethics in scientific experimentation



Experiments


It’s usually easier to help a student develop an experiment from some initial idea, making sure they identify appropriate variables and methods. Here are a few examples of things that can be done:


Psychology

The experiment portion of a psychology project can involve interviewing a sample of people or having them fill out a survey or test on a specific topic.

Examples:
  • How good are people at reading facial expressions?

  • Does screen time affect sleep?

Engineering

The experiment portion of an engineering project can involve the student making various models and testing them to find which one is the best.

Examples:
  • Which paper airplane design flies the best?

  • Which bottle rocket design goes the highest?

  • How to bake the perfect cookie (change ratios of ingredients)

  • Fastest method to lighting a fire

  • What ingredients make the best bar of soap?

Biology

The experiment portion of a biology project can involve growing simple plants like beans/peas/zucchini, documenting the decay process of mold/rot, or measuring germs present in sample using agar plates. 

Examples:
  • What conditions grow the largest (type of plant)?

  • Conditions that promote mold growth

  • Do different types of molds grow on different foods?

  • Do genetically modified seeds grow better or worse than others?

  • Does Lysol really kill 99.9% of bacteria?

Chemistry

The experiment portion of a chemistry project can involve the use of basic testing materials such as pH paper, iodine for starch tests, and scales. 

Examples: 
  • pH of various household items

  • How much vitamin C is in different store-bought fruit juice?

Students can also use Phet simulations to conduct experiments that may be beyond their capabilities to carry out themselves: https://phet.colorado.edu/en/simulations/filter?type=html

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