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Science Fair Project Ideas for 5th Grade

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Science Fair Project Ideas 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 travels the longest distance? View →
2 Does the color of an object affect how much heat it absorbs? View →
3 Which type of insulation keeps a cup of hot chocolate warmest? View →
4 How does the height of a ramp affect how far a car travels? View →
5 Does the size of a parachute affect how slowly it falls? View →
6 Which bridge shape made from popsicle sticks holds the most weight? View →
7 How does water depth affect wave speed in a pan? View →
8 Does the length of a rubber band affect how far it shoots? View →
9 Which container shape (sphere, cube, cylinder) melts ice fastest? View →
10 How does changing the weight of a pendulum bob affect swing time? View →

Also Read : Science Projects for Class 6 to 8

Biology

10 Projects

# Project Idea Explore
1 Do plants grow faster in soil, sand, or gravel? View →
2 Which type of light helps plants grow the tallest? View →
3 Does playing music help plants grow faster? View →
4 Which common drinks stain teeth the most using eggshells? View →
5 What happens to plants when they do not get enough water? View →
6 Which type of bread develops mold the fastest? View →
7 Do seeds germinate faster in warm or cold temperatures? View →
8 Does the amount of water affect how fast a plant grows? View →
9 Which natural material keeps fruit fresh the longest? View →
10 Do earthworms prefer dark or light soil environments? View →

Chemistry

10 Projects

# Project Idea Explore
1 Which fizzing tablet works the fastest in water? View →
2 What household liquids can be used as natural cleaners? View →
3 How does salt affect the time it takes water to boil? View →
4 Which materials dissolve the fastest in water? View →
5 Can you make a battery from different fruits? View →
6 Does temperature affect how fast sugar dissolves in water? View →
7 Which type of ice cube melts fastest: large, small, or crushed? View →
8 How do different liquids react to baking soda? View →
9 Can you remove stains better with hot water or cold water? View →
10 What happens when you mix milk and vinegar? View →

Earth Science

10 Projects

# Project Idea Explore
1 Which type of soil holds the most water? View →
2 How does slope angle affect the speed of landslides? View →
3 Can you predict rain by observing cloud types? View →
4 How does plant cover affect soil erosion from water? View →
5 What is the effect of salt on ice melting speed? View →
6 How does rock type affect how fast it weathers? View →
7 How does the color of the ground affect how hot it gets? View →
8 Can you create a mini water cycle in a glass jar? View →
9 How do shadows move across a day? (Sundial project) View →
10 How does the amount of sunlight affect local temperature over a week? View →

Health & Human Body

10 Projects

# Project Idea Explore
1 Does eating breakfast improve memory test scores? View →
2 Which hand sanitizer kills the most bacteria on hands? View →
3 Does exercise affect how fast your heart beats? View →
4 Which common foods have the most hidden sugar? View →
5 Does listening to music help you concentrate on homework? View →
6 Which drink rehydrates you fastest after exercise? View →
7 How does the amount of sleep affect your reaction time? View →
8 Which posture (sitting, standing) is best for reading comprehension? View →
9 Does the temperature of food affect how we taste sweetness? View →
10 Which healthy snack gives you the most energy boost? View →

Math & Patterns

10 Projects

# Project Idea Explore
1 Is your height related to your arm span? (Vitruvian Man test) View →
2 Do larger hands mean better at catching a ball? View →
3 Is there a pattern in the number of seeds in different fruits? View →
4 Do older people or younger people estimate time more accurately? View →
5 Can you find Fibonacci numbers in pinecones and flowers? View →
6 Does birth month affect how tall you are compared to classmates? View →
7 Is there a relationship between foot size and height in families? View →
8 Which shape tessellates the most efficiently on graph paper? View →
9 How close are people to guessing 60 seconds without a clock? View →
10 Is the number of siblings related to grades in your class? View →

Technology & Engineering

10 Projects

# Project Idea Explore
1 Build a solar oven from a pizza box and cook a marshmallow View →
2 Design the tallest tower possible from 20 pieces of spaghetti View →
3 Build a working model electric fan from a battery and motor View →
4 Create a water filter from sand, gravel, and cotton View →
5 Make a homemade compass using a magnetized needle and cork View →
6 Design a device that moves water uphill without a pump (Archimedes screw) View →
7 Build a model suspension bridge and test its load capacity View →
8 Create a working hydraulic arm using syringes View →
9 Build a model that demonstrates erosion using a sandbox and water View →
10 Make a working periscope from mirrors and a cardboard tube View →

Animal Science

10 Projects

# Project Idea Explore
1 Do fish respond differently to different colors of light? View →
2 Which type of bait attracts the most ants? View →
3 Do dogs prefer classical music or silence for napping? View →
4 Which type of bird feeder attracts the most bird species? View →
5 Do earthworms prefer moist or dry soil for movement? View →
6 Can crickets tell you the temperature? (Dolbear’s Law) View →
7 Do meal worms have a preferred habitat color or texture? View →
8 How do ants communicate food locations to other ants? View →
9 Do butterflies prefer certain flower colors for feeding? View →
10 Can goldfish recognize their owner vs a stranger? View →

Environmental Science

10 Projects

# Project Idea Explore
1 Which household items can be composted most effectively? View →
2 Does recycled paper have different properties than new paper? View →
3 How does litter affect the germination of nearby seeds? View →
4 Which common plant can purify the most indoor air pollution? View →
5 Does reusing plastic bags affect how quickly they degrade? View →
6 What is the effect of road salt on plant growth in spring? View →
7 Can you power a small light using a vegetable battery? View →
8 How does the color of a roof affect indoor room temperature? View →
9 Which packaging material has the smallest environmental footprint? View →
10 Can compost tea improve plant growth compared to tap water? View →

Astronomy & Space

10 Projects

# Project Idea Explore
1 Build a model solar system to scale in your school hallway View →
2 Which planets would you weigh the most or least on? View →
3 How does the moon phase affect tide height? (Research project) View →
4 Build a model rocket from cardboard and test flight stability View →
5 How many stars can you see with the naked eye vs binoculars? View →
6 Make a model of the phases of the moon using Oreo cookies View →
7 Track the position of Jupiter over a month using binoculars View →
8 How does distance from a light source affect its apparent brightness? View →
9 Build a simple telescope from lenses and tubes View →
10 Study the International Space Station pass times from your location View →

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