High School Science Fair Projects

Need a science fair project that's fun, engaging, and appropriately rigorous for a high school science fair? has assembled a rich collection of high school science fair projects and high school science fair project ideas written by our team of professional scientists, science teachers, and educational consultants. We offer free high school science experiments on every science fair topic, including physics, chemistry, biology, engineering, and even psychology. Check the boxes in the sidebar to filter your results, or use the search bar to find a winning idea for your upcoming science fair. Hundreds of good science fair projects are only a click away.

Sort by:
Showing 121 to 135 of 595
Bake some cookies with an oven that collects sunlight and traps the shorter wavelengths (heat!).
Middle School
Seventh Grade
In this science fair experiment, high school students fit the growth pattern of bacteria to a mathematical model and predict future colony expansion.
High School
Applied Science
This science fair project idea tests whether it is true that humans are in the morning than later during the day/night.
High School
Middle School
This experiment examines whether social orientation (extroversion or introversion) is correlated with memory.
High School
Behavioral/Health Science
This experiment will explore the possibility of a connection between lunar cycles and how humans are affected.
High School
Earth & Space Science
This science fair project idea examines how well individuals can remember a story they were told and how accurately they pass that story along.
High School
Elementary School
This experiment will explore whether fractals really repeat themselves infinitely.
High School
Applied Mathematics
Science fair project that examines search engine optimization, internet search trends using a statistical study of searched keywords.
High School
Investigate the kinds of memories we tend to store and the emotions we store with them. Determine if memories have a strong emotional component.
Ninth Grade
Tenth Grade

Share these projects with friends

clear all

Filter by

DIY Worksheets
Make puzzles and printables that are educational, personal, and fun!
Matching Lists
Quickly create fun match-up worksheets using your own words.
Word Searches
Use your own word lists to create and print custom word searches.
Crossword Puzzles
Make custom crossword puzzles using your own words and clues.