Science fair projects are required in a lot of schools and teach kids a lot about science, but they’re also a lot of fun. In fact, kids usually look forward to coming up with ideas for a cool science project, but if your own youngster can’t come up with anything unique, you’ve come to the right place. Science projects can be simple or complicated, but as long as the student comes away understanding the purpose of this experiment, and the audience comes away having also learned additional information from the great science demonstration, it will have served its purpose. Below are 50 great high school biology science fair projects you can consider.
Perfect for high school students interested in STEM and robotics, you can design your own robot and then create it on a 3D printer. No expensive printer needed!
Substitutes for eggs include ground flax seed, tapioca flour, silken tofu, fruit puree, arrowroot powder, banana, applesauce, and either orange or lemon juice mixed with baking soda.
The purpose of this experience is to study yeast metabolism under aerobic and anaerobic conditions. You’ll do this by measuring the output of carbon dioxide.
Students can prove that aspirin dissolves faster in a cup of water or a cup of water and sugar, while dissolving slower in water and cornstarch. An easy science project!
This experiment determines how much catalase is in products such as potatoes and spinach. The food is put into test tubes, and hydrogen peroxide is added; if it foams, there is a catalase present.
This is a rather long experiment but can be executed by both high school kids and middle school students. The process is too long to be described here.
Kids will determine how the amount of life affects the movement of a plant. This is an experiment on a process known as phototropism.
Students can demonstrate different ways to taste things that are salty, sweet, or sour using samples of different foods.
This is a simple experiment that even an elementary student can do. They’ll test bacteria growth in several different Petri dishes.
This experiment helps answer the question, does brushing your teeth more often reduce the amount of bacteria in your mouth?
You can turn a lemon into a battery with items such as lemons, galvanized nails, alligator clips with wires, pieces of copper, and a light source.
- Impact of Acid Rain on Seedling Germination
You can do this experiment with some pinto beans, plastic pipettes, pH testing strips, distilled water, vinegar, and a few others.
Perfect for elementary school kids, you’ll need a maze, stopwatch, music, notebook, and of course, the mice.
Help people discover if someone’s smile is genuine or fake. This is a good social science experiment!
This is a great way to study kinetic energy. Students will explore how much a rubber band stretches in relation to how far it can go, which is a surprisingly good basic mechanical engineering project.
This experiment uses a blob of gallium to recreate a heart and allow people to see the heartbeat in action.
Designed for grades 3–6, this project demonstrates how a pendulum works and what causes it to go faster or slower.
This experiment allows you to devise a way to test the iron content in various breakfast cereals.
This is one of those easy biology experiments that lets kids determine how much salt has to be in a body of water to make an egg float.
Designed for grades 9–12, kids use a piece of classical music to demonstrate various mathematical patterns.
Using an infinity mirror, kids can demonstrate various optical illusions. This one usually requires a trip to the hardware or arts and craft store.
Using a 3D printer, make several racing cars and race them. For even more fun, use cars with veggies or other foods on top of them.
This experiment determines if cell phones really emit radiation and, if so, exactly how much they emit.
Designed for grades 1–3, this is a simple science experiment that tests how the numbers or letters in a file change the size of that particular file.
Fill glasses up with various liquids—milk, water, tonic water, vinegar, and oil—and see which one dissolves Peeps the fastest.
There are numerous experiments you can do to grow vegetables in a hydroponic planter, and they provide answers to basic plant growth questions as well.
This fair project idea involves using computer-generated and 3D software to create the perfect storybook.
You can do this experiment in any number of ways. It’s super easy, and all you have to do is buy some black lights and demonstrate how they work.
Print out a bunch of cards with various colors printed on each. In other words, write “blue” on one card, “red” on another, etc., but print the words in a different color, then have people try to read the word on the card and not the color it’s written in.
Using simple items such as cardboard and a few others, kids demonstrate how solar energy can heat up a cold room.
This experiment requires a control group and gives one group a placebo. You test people’s heart rates after they drink unmarked sodas either with or without caffeine. This is a good experiment with the human body.
This one is rather complicated, but it shows how the naked eye can see one thing while you’re hearing something that really isn’t there. You must have video editing experience to do this.
With this experiment, you’ll use rather complex systems and materials to make a hydraulic claw, then grab various items with it as you show it off to others.
Using different materials such as a Pico board, household materials, Scratch, and a computer, you’ll be making your own drum set.
This is an excellent environmental science project in which you’ll demonstrate the best way to test various products to see if they are biodegradable.
There are several experiments demonstrating a dependent variable, independent variable, controlled variable, etc., but you have to start by knowing what each one of these is.
A good fair competition experiment shows different weather-related events, including a demonstration of barometers, anemometers, hygrometers, and more.
In this fair experiment, you’ll be demonstrating how acidic water can actually make rocks disappear.
This can be a fun experiment and involves dissolving a bunch of Pepto-Bismol pills, mixing the solution with muriatic acid, and a few other steps until you end up with a dark crud-like item.
This is a fun high school science experiment that involves buying a few chemicals, but it’s well worth it in the end.
When it comes to simple chemistry experiments, this one can’t be beat. It’s simple and fun, and you can even eat it afterward!
You can create your own project demonstrating momentum using popsicle sticks, string, and some marbles.
Designed for grades 2–5, this simple project involves finding out how much oil different rocks are able to soak up.
It’s a good idea to use this experiment for elementary school kids. They’ll experiment with the different ways that water can actually break rocks.
Here’s a good research question for you: can you recreate DaVinci’s flying machine? Find out with this experiment!
Elementary schoolers will love this experiment, which uses magnets to mimic the process that science uses to duplicate DNA.
Young children can get together with their science buddies and write in grass to see a clear example of photosynthesis.
This isn’t the most scientific method in the world, but high schoolers love it—and it works! You’ll use empty plastic bottles and a few other things and see how high they can fly.
If the direction of gravity changes, how does it affect root growth? You can easily find out in this experiment.
Find out if you can use liquids besides water to make plants grow, such as milk, soda, juice, and others.
If you find yourself disproportionately interested in any of the above high school biology science fair projects, you may want to consider further pursuing biology or that specific aspects of the science industry through a summer science program or camp, which cover topics from robotics to chemistry. High school students may turn compelling science fair ideas into a future career in the science field if they’re open to diving deeper into certain science experiments and pursuing further relevant studies.