8th grade science fair projects

149+ Great 8th Grade Science Fair Projects & Experiments

Are you an 8th-grader looking for awesome 8th grade science fair projects? If yes, we are here to give the best science fair project ideas that will not only impress your classmates and teachers but also teach you valuable scientific concepts. 

Generally, Science fairs are a fantastic opportunity for students to explore the world of science through hands-on experiments and investigations.

We’ve compiled a list of over 149 intriguing and innovative science fair project ideas and experiments for 8th graders. Whether you’re interested in biology, chemistry, physics, or environmental science, there’s something here for everyone. 

So, let’s dive into the exciting world of science and discover your next winning project!

Also Read: Science Research Topics

What Is A Science Fair

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Students of all ages, usually from elementary school to high school, show off their science projects, and tests, or study at a science fair. It is an educational event or competition. 

The main goal of a science fair is to get kids interested in topics like science, technology, engineering, and math (STEM). Science shows give people the chance to do hands-on science research, learn how to think critically, and share their results with a larger audience.

A science fair is to promote scientific inquiry, critical thinking, and hands-on learning among students. Students explore scientific concepts, conduct experiments, and present their findings in a structured and often competitive setting.

How A Typical Science Fair Works

If you want to know what is a procedure in a science fair project and how it works, you can follow these points. It is such as;

1. Project Selection

Students choose a scientific topic or question that interests them and design a project around it. This could involve conducting experiments, collecting data, analyzing data, or building a model or prototype.

2. Research

Students research their chosen topic to understand existing knowledge and relevant scientific principles. They may also review literature, consult with experts, and gather background information.

3. Experimentation

If their project involves experiments, students plan, conduct, and document experiments carefully. They may need to follow the scientific method, including hypothesis formulation, data collection, and analysis.

4. Data Collection

Students collect data, which often includes measurements, observations, and other relevant information. They record their findings systematically.

5. Analysis 

After collecting data, students analyze the results to draw conclusions. They may use graphs, charts, and statistics to present their findings effectively.

6. Display

Students create a display board or presentation to communicate their project to others. The display typically includes key information such as the problem statement, hypothesis, methods, results, and conclusions. Visual aids, diagrams, and photographs are often used to enhance the presentation.

7. Presentation

Students present their projects to judges, teachers, fellow students, and sometimes parents or the public. They may be asked questions about their work to assess their understanding and communication skills.

Top 149+ Great 8th Grade Science Fair Projects & Experiments

The following are the best 8th grade science fair projects ideas for students. It is such as;

Best 8th Grade Science Fair Projects In Biology 

  • Plant Growth with Music
  • The Effect of pH on Enzyme Activity
  • Comparing Organic and Inorganic Fertilizers
  • Testing the Antibacterial Properties of Common Household Items
  • Which Food Attracts the Most Fruit Flies?
  • The Effect of Light Color on Plant Growth
  • Comparing the Efficiency of Natural and Chemical Pest Repellents
  • Do Plants “Breathe” at Night?
  • The Impact of Temperature on Seed Germination
  • Microorganisms in Your Environment

Easy 8th Grade Science Fair Projects In Chemistry 

  • DIY pH Indicator
  • Electrolysis of Water
  • The Effect of Temperature on Crystal Growth
  • Comparing the Vitamin C Content in Different Fruits
  • Chemical Reactions in Cooking
  • Testing the pH of Household Cleaners
  • Acid Rain’s Impact on Plant Growth
  • The Chemistry of Baking Soda and Vinegar
  • Testing the Effect of Temperature on Battery Performance
  • The Science of Lava Lamps

Cool 8th Grade Science Fair Projects In Physics 

  • The Relationship Between Air Pressure and Altitude
  • The Pendulum’s Period
  • The Effect of Surface Texture on Friction
  • Constructing a Homemade Electromagnet
  • Investigating Projectile Motion
  • The Physics of Sound Waves
  • The Relationship Between Light Intensity and Distance
  • Comparing Solar Cell Efficiency
  • Newton’s Laws in Everyday Life
  • The Effect of Magnet Strength on Ferrofluid Behavior

Fast And Easy 8th Grade Science Fair Projects In Environmental Science 

  • Water Pollution Testing
  • The Impact of Oil Spills on Marine Life
  • Air Quality Monitoring
  • Waste Reduction Strategies
  • The Effect of Ocean Acidification on Marine Shells
  • Renewable Energy Sources
  • Biodiversity and Ecosystem Health
  • The Impact of Deforestation on Carbon Dioxide Levels
  • The Greenhouse Effect
  • Recycling Plastics

Engineering Projects For 8th Grade Science Fair Projects Winners

  • Designing a Wind-Powered Vehicle
  • Building a Simple Electric Motor
  • Designing a Solar Oven
  • Creating a Hydraulic Robot Arm
  • DIY Water Filtration System
  • Paper Bridge Construction
  • Balloon-Powered Car Design
  • The Science of Flight
  • Building a Simple Circuit Board
  • Water Rocket Launch

Good Science Fair Space and Astronomy Projects

  • Solar System Model
  • Studying Lunar Phases
  • Mapping the Night Sky
  • Investigating the Effects of Microgravity
  • Simulating Exoplanet Discoveries
  • Modeling the Earth’s Seasons
  • Rocket Science: Launching Model Rockets
  • Studying Solar Flares and Their Impact on Earth
  • Comparing the Characteristics of Planets
  • Black Holes and Gravitational Waves

Earth Science Projects For Science Students In High School

  • Volcano Eruptions
  • Investigating Earthquakes
  • Weather Patterns and Predictions
  • Formation of Crystals in Rocks
  • Soil Erosion and Conservation
  • The Water Cycle
  • Natural Disaster Preparedness
  • Ocean Currents and Climate
  • Investigating the Greenhouse Effect in Terrariums
  • The Formation of Fossils

Great 8th Grade Science Fair Projects For Behavioral Science Projects

  • The Impact of Music on Mood
  • The Stroop Effect
  • Memory and Recall
  • The Influence of Peer Pressure on Decision-Making
  • The Psychology of Color
  • The Impact of Sleep on Academic Performance
  • Effect of Social Media on Well-Being
  • The Power of Persuasion
  • Cultural Differences in Perception
  • The Psychology of Decision-Making

Health and Medicine Science Fair Projects

  • Comparing the Effectiveness of Natural Remedies
  • The Impact of Exercise on Heart Rate
  • Handwashing: The Science of Hygiene
  • Healthy Eating Habits
  • The Influence of Diet on Blood Sugar Levels
  • The Effects of Stress on Health
  • Microbiome Analysis
  • Effects of Smoking on Lung Capacity
  • The Science of Vaccination
  • Analyzing the Impact of Sleep on Physical Health

Science Fair Robotics and AI Projects

  • Building a Simple Robot
  • Programming a Chatbot
  • Obstacle-Avoidance Robot
  • DIY Water Rocket Launch
  • Voice-Activated Home Automation
  • Machine Learning for Predictive Analytics
  • 3D Printing and Robotics
  • Autonomous Drone Programming
  • Robotic Arm Control
  • Deep Learning for Image Recognition

8th Grade Science Fair Social Sciences Projects

  • Analyzing the Impact of Social Media on Relationships
  • Studying Cultural Stereotypes
  • The Influence of Advertising on Consumer Behavior
  • Bullying Prevention Strategies
  • Environmental Conservation Behavior
  • The Impact of Empathy
  • Media Influence on Body Image
  • Cross-Cultural Communication
  • Understanding Prejudice and Discrimination
  • The Psychology of Altruism

Computer Science and Programming 8th Grade Science Fair Projects

  • Creating a Video Game
  • Encryption and Data Security
  • Coding and Debugging
  • Website Development
  • App Development
  • Artificial Intelligence Chatbot
  • Password Strength Analysis
  • Data Visualization
  • Machine Learning for Prediction
  • Cybersecurity and Ethical Hacking

Simple 8th Grade Agricultural Science Fair Projects

  • Crop Rotation Experiment
  • The Impact of Soil Types on Plant Growth
  • Hydroponics vs. Soil-based Farming
  • Pesticides and Pollinators
  • Composting and Soil Fertility
  • Plant Nutrient Analysis
  • Aquaponics Systems
  • Food Preservation Techniques
  • The Impact of Fertilizer Types on Plant Growth
  • Biodegradable vs. Non-Biodegradable Packaging

Best Material Science Projects

  • Testing Conductivity of Materials
  • Materials for Solar Cells
  • Strength of Materials
  • Materials for Filtration
  • The Science of Superconductors
  • Materials for Insulation
  • Shape Memory Alloys
  • Materials for Nanotechnology
  • The Science of Polymers

Most Interesting Science Fair Projects In Materials for 3D Printing

  • Geology and Earth Science Projects
  • Mineral Identification
  • Rocks and Minerals Collection
  • Geological Mapping
  • The Formation of Fossils
  • Earth’s Magnetic Field
  • Plate Tectonics and Earthquakes
  • Volcanic Eruptions
  • The Rock Cycle
  • The Geological History of Your Region

What Is An Abstract For A Science Fair Project

An abstract for a science fair project is a concise summary that provides a brief overview of your entire project. It’s typically one paragraph long and serves as a quick introduction to your project, giving readers a glimpse of what your project is about, what you did, and what you found. The abstract should include the following key elements:

1. Purpose/Objective: Explain the main goal or purpose of your project. What question were you trying to answer or what problem were you investigating?

2. Methodology: Briefly describe the methods and procedures you used to conduct your experiment or research. Include any important variables or materials used.

3. Results: Summarize the key findings or outcomes of your project. What did you discover or observe during your experiment or research?

4. Conclusion: State your project’s conclusion or the significance of your findings. What did you learn from your project, and how does it contribute to scientific knowledge or real-world applications?

5. Implications: If relevant, mention any potential implications or applications of your findings.

6. Recommendations: Suggest any recommendations for further research or experiments related to your project.

How To Choose A Good Science Fair Project

Choosing a science fair project can be an exciting but challenging task. Here are some steps to help you select the right science fair project:

1. Identify Your Interests

Start by thinking about your interests and passions. Consider what topics in science or technology fascinate you the most. Projects are more enjoyable and engaging when they align with your interests.

2. Narrow Down the Field

Science is a vast field. Narrow down your interests to specific areas like biology, chemistry, physics, astronomy, environmental science, or computer science. This will help you focus your project search.

3. Review Guidelines

Review the guidelines and requirements provided by your school or science fair organizers. Ensure you understand the project length, presentation format, and any specific themes or rules for the fair.

4. Brainstorm Ideas

Brainstorm a list of potential project ideas within your chosen field. Think about questions or problems you’d like to explore. Don’t worry about the feasibility at this stage; just generate as many ideas as possible.

5. Research and Feasibility

Research each idea to determine its feasibility. Can you access the necessary materials and equipment? Is it safe to conduct the experiment? Are there resources available to help you understand the topic? Consider the complexity and time required for each idea.

6. Choose a Testable Hypothesis

Once you’ve narrowed down your ideas, choose one with a clear, testable hypothesis. A hypothesis is a statement that predicts an outcome. It should be specific, measurable, and based on existing knowledge.

7. Consult with Teachers or Mentors

Seek guidance from your science teacher or a mentor, if available. They can provide valuable input, help refine your project idea, and ensure it aligns with educational goals and safety standards.

Conclusion – 8th Grade Science Fair Projects

With these 149+ 8th grade science fair projects and experiments, students have a wide range of exciting topics to choose from. Keep in mind to select a project that aligns with your interests and challenges you to learn new concepts. 

It offers the opportunity for creative exploration. Additionally, ensure that your project adheres to safety guidelines and ethical considerations.

The process of conducting a science fair project involves problem-solving, critical thinking, data collection, analysis, and presentation skills. Whether you’re interested in biology, chemistry, physics, or earth and environmental sciences, there’s a fascinating project waiting for you. 

So, pick your favorite project idea, dive into your research, and enjoy the wonderful world of science! 


What makes a winning science fair project?

If you want to win at the higher science fair levels, originality and innovativeness are extremely important. Develop a new method or technique, or research something nobody knows about.

What are the 7 steps of the scientific method?

There are seven steps to the scientific method: Question, Research, Hypothesis, Experiment, Data Analysis, Conclusion, and Communication.

What is a good science fair question?

These are examples of good science fair project questions: How does water purity affect surface tension? When is the best time to plant soy beans? Which material is the best insulator?

What is science project work?

A science project is an independent study of a particular topic that uses the scientific method in order to answer a specific question about how or why something is being impacted in our world.

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