The Best Science Fair Project Guide and Experiments (that actually work!)

Hey kids! Are you wondering what to do for your school science fair?

You want to do something cool and fun. You want to “wow” the judges with your research and presentation.

But you don’t know where to start!

Look no further. We’ve put together a great science fair guide that will walk you through the process.

PLUS we have listed some fun experiments (that actually work!) . Go on and harness your inner scientist and rock that fair!

Of course, there are necessary steps to having a good science fair project. The scientific method is key and it is the best way to investigate the problem you chose.

SCIENCE FAIR PROJECT GUIDE:

STEP 1: Choose a topic.

Make sure it is one that interests YOU, the science kid! Don’t let your parents do the work for you. Do you like space? Airplanes? Flowers? Pennies? Worms? Snow? Burritos? Sports? Find an interesting topic and get started. You’re more likely to finish your project if you are motivated, or interested, to do it.

STEP 2: Ask a question (or several questions)

Why is it important to know the answer to this question? If it helps, start with questions like “Which (blank) helps (blank) do best?” or “What can I add to (blank) to help (blank)?”

Example:

“Which liquid helps plants do/grow best?”

“What can I add to an egg to help protect it from breaking when I drop it from 6 feet high?”

“What kind of detergent washes the most stains?”

“Which food does my pet like best?”

STEP 3: Research

Libraries, Google, your science teachers, that friendly neighborhood scientist are all your best resources to find out everything you can about your topic.

* Make sure to keep records or all your sources and references

STEP 4: Generate a hypothesis

Come up with a hypothesis, or a reasonable guess, for your question. Use the information you got from your references to make that prediction.

STEP 5: Design a procedure/experiment

How will you measure your results? You want to be as accurate as possible and try to control as much of your environment as you can so you’re only changing one thing (or variable) at a time.

Example:

If you want to compare what helps plants grow best, do an experiment where you have 2 of the same plants in the same type of soil and pot and the same location/environment and only change what you add to grow them such as water vs. lemon juice. You can add more variables such as soda or grape juice, just try to make it so that you can prove that the only reason the plant grew better/worse is because of that different variable.

STEP 6: Materials

List and gather the materials you need to carry out your experiment.

STEP 7: Experiment!

You will need to repeat your experiment at least three times and double check your measurements just to make sure it actually works and gives you the same results.

STEP 8: Observe and record the data

Write down what happened in the experiment. What did you see? Which variable caused a different result?

STEP 9: Analyze your data

Find out if your hypothesis, or guess, was right or wrong. It’s absolutely okay if you didn’t correctly predict the results. Many scientific discoveries happen by accident and were not expected by the scientists who did the experiment. This is what makes it so exciting!

STEP 10: Next steps

Try and come up with new questions based on the results of your experiment. How can you improve your experiment in the future?

www.github.com

But of course you will need to make a poster to present your methods and findings.

A few links for making the perfect science fair poster are here and here. Be sure to include lots of pictures and make sure your words are legible so the judges can understand what you did. And be prepared to answer any questions they might have.

Do you need help in picking a topic? Let us help.

Here are a few great ideas that work very well.

1. Why do we have to wear sunscreen when we go outside?

Find out with this experiment about the sun and potentially harmful ultraviolet (UV) rays. Use UV-sensitive beads which change color when exposed to sunlight to understand how the Sun produces different wavelengths of light and what materials can protect us from those potentially harmful rays. You can also use black light as a source of UV light.

Project Extension: you can use different SPF sunscreens to cover the beads and see if that helps protect them from the harmful UV rays. You can really tell why your parents say it is important to put on sunscreen when you go outside on a sunny day or at the beach!

2. Do things float better in the ocean or in a river?

sciencekiddo.com

This experiment helps you understand the concept of water density. You can find out if the ocean (or saltwater) helps things like boats and animals float better and if so then why. You can test different salt levels to prove whether having more or less salt makes the water more or less buoyant. Be sure to keep track of your measurements!

3. Why do we have to brush our teeth?

youtube.com

Want to know why it’s important to visit your dentist so often? Here’s a very cool experiment using eggshells to simulate teeth enamel, the stuff that covers your teeth. You can soak the eggs in different substances with different amounts of sugar and see how they affect the eggshells. As a bonus, you can test to see how brushing with toothpaste and toothbrush actually helps after you’ve gotten them nice and dirty. You’ll never look at sugary drinks the same way.

4. Do hand sanitizers really work or is washing your hands better?

youtube.com

Here’s a neat experiment to understand why it is important to wash your hands and how to see microbiology in action. You use actual Petri dishes and establish the scientific need for having a control (untouched) sample. It’s both super gross and very cool at the same time! Try to think of other variables you can test as well!

5. Why do pennies get nasty and dark and what will make them shiny again?

In this experiment, you gather lots and lots of dirty pennies and test out different household acids in order to clean them. Why do they get like that and what ingredient cleans them the best? This is a great chemical reaction experiment that leaves you feeling shiny and bright!

6. Squirmy Wormy: Which type of soil do earthworms like best?

If you LOVE getting your hands dirty, here’s a cool zoology project that’ll show you why earthworms are important and what happens to dead plants in the soil. After your project is done, you can place these guys in your garden and let them help add nutrients to your garden soil!

7. PAPER AIRPLANE SCIENCE. What type of airplane flies best?

Who doesn’t love engineering a paper airplane? Yes, it is considered engineering when you design a machine (or paper) to fly. Pick a few different fun designs of paper airplanes and then measure how far each design will go. Try to predict which one will fly the furthest or which one will fly in a loop. What things about each airplane do you think affects its flight? Research about aerodynamics and remember to double check your measurements!

8. Which ramp surface will a marble roll the farthest on?

This one lets you experiment with different textures and see what factors affect how far a marble can roll. What exactly is friction and how does it affect distance traveled by an object? Check this cool experiment out and see for yourself!

We hope this list helped you find the perfect science fair project you were looking for! We would love to hear from you about the project you chose.

And if you have any questions, feel free to contact us - your friendly science experts.

Keep on asking questions and experiment.

That is what science is all about!

-Julie Esteves Nagy

Julie is a Puerto Rican scientist who enjoys traveling the world, singing a cappella, and converting oxygen into carbon dioxide on a regular basis. She worked in the Neurosciences Laboratory at the NASA Johnson Space Center in Houston, TX for several years and then found a passion in sharing her love of science with children (basically found any excuse to use dry ice and send kids home with slime).