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National Winning Science Fair Projects for 5th Grade

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Science Fair Resources

National Winning Science Fair Projects for 5th Grade

Discover 100 curated project ideas across 10 subject streams. Each idea is designed to help students win at school, district, and national science fairs.

📋 100 Projects
🏆 Competition Ready
📚 10 Streams

Physics

10 Projects

# Project Idea Explore
1 Which paper airplane design flies farthest? (variable: wing shape) View →
2 Does the color of a surface affect how much heat it absorbs from sunlight? View →
3 Which type of ball bounces highest from the same drop height? View →
4 How does the length of a pendulum affect the number of swings per minute? View →
5 Which container shape keeps ice cream from melting the longest? View →
6 Does the weight of a car affect how far it rolls down a ramp? View →
7 Can you generate electricity by spinning a magnet inside a coil? View →
8 Which shape of a boat hull carries the most pennies before sinking? View →
9 How does wind direction and speed affect a kite’s flying height? View →
10 Does surface texture affect how far a toy car slides after rolling? View →

Also Read : National Winning Science Fair Projects for Class 9

Biology & Plants

10 Projects

# Project Idea Explore
1 Which color of light helps bean plants grow tallest in two weeks? View →
2 Does talking to plants help them grow faster? View →
3 Which type of soil (clay, loam, sand) grows the healthiest tomato plant? View →
4 Do plants grow better with tap water, filtered water, or rainwater? View →
5 Which common household item slows mold growth on bread best? View →
6 Does the direction seeds are planted (up or down) affect germination speed? View →
7 Can plants grow without soil using only water and nutrients? View →
8 Which fruit ripens fastest at room temperature vs in the refrigerator? View →
9 Does caffeine in coffee water affect how fast bean sprouts grow? View →
10 Which natural fertilizer (compost, egg shells, banana peels) grows plants best? View →

Chemistry

10 Projects

# Project Idea Explore
1 Which household liquid cleans pennies best and why? View →
2 Does hot water or cold water dissolve sugar faster? View →
3 Which natural fruit juice makes the best invisible ink? View →
4 Can you make a natural glue that holds as well as school glue? View →
5 Which liquid has the highest density? (Layered liquids experiment) View →
6 Does adding salt make water boil faster or slower? View →
7 Which brand of paper towel absorbs the most water? View →
8 Can you make a pH indicator from red cabbage that beats litmus paper? View →
9 Does the shape of ice affect how fast it melts? View →
10 Which soda pop has the most CO2 gas dissolved in it? View →

Earth Science

10 Projects

# Project Idea Explore
1 Which type of rock weathers fastest when exposed to vinegar (acid rain)? View →
2 Which soil type (sand, clay, loam) holds the most water? View →
3 Does slope angle affect how fast water erodes soil in a tray? View →
4 Can you predict tomorrow’s weather from cloud patterns? View →
5 Does the color of the ground affect how hot it gets in sunlight? View →
6 Which type of container loses heat the fastest (glass, plastic, metal)? View →
7 How does plant cover affect the amount of runoff from rain? View →
8 Can you build a model that shows how mountains form from plate pressure? View →
9 Which local material best filters muddy water to make it clear? View →
10 Does grass, concrete, or sand get hottest in summer sunlight? View →

Health & Human Body

10 Projects

# Project Idea Explore
1 Does breakfast improve concentration and spelling test scores? View →
2 Which hand washing technique removes the most germs? View →
3 Does exercise for 10 minutes improve your memory recall test? View →
4 Which healthy snack gives you the most energy for PE class? View →
5 Does listening to music while studying improve quiz scores? View →
6 Which sunscreen SPF actually blocks the most UV using UV beads? View →
7 Does the amount of sleep the night before affect your reaction time? View →
8 Which common food has the most hidden sugar content? View →
9 Does posture while reading affect reading speed? View →
10 Can smelling lavender or peppermint improve concentration during tests? View →

Environmental Science

10 Projects

# Project Idea Explore
1 Which common household waste item breaks down fastest in soil? View →
2 Can you filter polluted water using sand, gravel, and charcoal? View →
3 Which indoor plant purifies air the most (spider plant, aloe, pothos)? View →
4 Does recycled paper have the same strength as new paper? View →
5 Which material (plastic, glass, metal, paper) has the best recyclability? View →
6 Can you power a small LED using a vegetable or fruit battery? View →
7 Which color of roof keeps a house the coolest in summer? View →
8 Does composting really reduce the amount of waste in a landfill? View →
9 Which packaging material breaks down the fastest in water? View →
10 How does litter near a stream affect the plants growing nearby? View →

Technology & Engineering

10 Projects

# Project Idea Explore
1 Build the strongest possible bridge from popsicle sticks and glue View →
2 Design a solar oven and measure the highest temperature it reaches View →
3 Which bottle rocket design (fin shape) flies the straightest? View →
4 Can you build a working water filter from natural materials? View →
5 Build a model dam and test how much water pressure it can hold View →
6 Design a parachute that slows an egg fall without breaking it View →
7 Build a windmill from paper that generates the most rotation View →
8 Can you build a simple motor from a battery, copper wire, and magnets? View →
9 Design a boat that holds the most pennies without sinking View →
10 Build a marble maze that solves in the fewest total moves View →

Math & Data

10 Projects

# Project Idea Explore
1 Is your height equal to your wingspan? Test Vitruvian Man’s claim View →
2 Which guessing strategy wins most often in a number guessing game? View →
3 Do people with longer ring fingers run faster? (2D:4D digit ratio) View →
4 Is there a pattern in the winning numbers of your local lottery? View →
5 Can you predict coin flip results better with more flips? View →
6 Do people overestimate or underestimate a minute of time? View →
7 Is there a relationship between shoe size and height in your class? View →
8 Do students who eat lunch score better on afternoon quizzes? View →
9 Is there a pattern in which numbers people randomly choose? View →
10 Do students spend more time on easy or hard problems when test-taking? View →

Animal Science

10 Projects

# Project Idea Explore
1 Do ants prefer sweet or salty food? View →
2 Which color of flower attracts the most bees? View →
3 Do dogs respond differently to happy vs angry human voices? View →
4 Do goldfish remember feeding times and gather before mealtime? View →
5 Which bird species visits a feeder most in winter mornings? View →
6 Do meal worms prefer light or dark environments? View →
7 Can butterflies taste food with their feet? (Behavioral test) View →
8 Which household smell repels ants most effectively? View →
9 Do cats prefer patterned or solid toys for playing? View →
10 Do crickets chirp faster in warmer temperatures? View →

Psychology & Social Science

10 Projects

# Project Idea Explore
1 Does wearing a school uniform affect how teachers treat students? View →
2 Do kids eat more vegetables when they are shaped into fun designs? View →
3 Does peer pressure make people give wrong answers on easy questions? View →
4 Do people read faster on paper or on a screen? View →
5 Does the color of a plate affect how much food you eat? View →
6 Do people remember faces or names better after one introduction? View →
7 Does background music type affect how fast people complete a puzzle? View →
8 Do taller people have an advantage in being picked as group leaders? View →
9 Does the time of day affect how many math problems students can solve? View →
10 Do people tip more or less when waitstaff smile vs do not smile? View →

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