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Science Fair Ideas for 7th Grade

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Science Fair Resources

Science Fair Ideas for 7th 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 Test which bridge shape holds the most weight using popsicle sticks View →
2 Measure how ramp height affects the speed of a rolling car View →
3 Compare the insulation of different materials using ice cubes View →
4 Study how the angle of a solar panel affects energy output View →
5 Demonstrate that hot air rises using tissue paper and a lamp View →
6 Test which paper airplane design flies the farthest View →
7 Measure the bounce height of balls with different pressures View →
8 Investigate how string length affects pendulum swing time View →
9 Test which magnet shape has the strongest pull force View →
10 Compare sound conduction through different solid materials View →

Also Read : Science Exhibition Working Models Ideas for Class 12

Chemistry

10 Projects

# Project Idea Explore
1 Grow crystals using salt, sugar, and alum and compare size View →
2 Test which household acid reacts fastest with baking soda View →
3 Study the effect of temperature on yeast fermentation and CO2 production View →
4 Make elephant toothpaste and test the effect of H2O2 concentration View →
5 Investigate which antacid neutralizes acid most effectively View →
6 Test the effect of salt on the boiling point of water View →
7 Study which juice has the highest vitamin C content using iodine test View →
8 Make a lava lamp and study the density of liquids View →
9 Test the ripening effect of ethylene gas on bananas using different bags View →
10 Investigate the effect of pH on the color of red cabbage indicator View →

Biology

10 Projects

# Project Idea Explore
1 Test which light color promotes the fastest plant growth View →
2 Study the effect of music on plant growth rate View →
3 Investigate whether hand sanitizer or soap is more effective against bacteria View →
4 Test how temperature affects the germination of seeds View →
5 Study the effect of different fertilizers on bean plant growth View →
6 Investigate which common foods are most effective as antibiotics View →
7 Test the effect of caffeine on heart rate using Daphnia View →
8 Study how different surfaces affect bacterial growth View →
9 Investigate the effect of salt concentration on brine shrimp survival View →
10 Test which colored light slows mold growth on bread View →

Earth & Environmental Science

10 Projects

# Project Idea Explore
1 Test which soil type retains the most water View →
2 Measure how slope affects soil erosion using water flow trays View →
3 Investigate the effect of oil spills on water birds feathers View →
4 Study how different materials affect local heat island temperatures View →
5 Test the effectiveness of different water filtration materials View →
6 Measure how vegetation cover affects runoff rate View →
7 Study the effect of acid rain on limestone rock dissolution View →
8 Investigate how urban vs rural air affects clean paper color change View →
9 Test which building material has the best thermal mass View →
10 Study how different ground covers affect frost formation View →

Math & Statistics

10 Projects

# Project Idea Explore
1 Analyze whether birth month predicts sports success using class data View →
2 Test whether people can estimate volume accurately without measuring View →
3 Study the pattern of lottery number frequency over 100 draws View →
4 Investigate the relationship between shoe size and height View →
5 Test whether random number generators are truly random View →
6 Analyze how survey question wording affects respondent answers View →
7 Study the math of tiling patterns and their symmetry groups View →
8 Measure the accuracy of human time estimation over intervals View →
9 Investigate whether left or right-handed people have better reaction time View →
10 Study the spread of viral content using geometric growth simulation View →

Technology

10 Projects

# Project Idea Explore
1 Build a solar oven and measure the maximum temperature it reaches View →
2 Design a water rocket and test how water volume affects flight height View →
3 Build a simple motor from a battery, magnets, and wire View →
4 Make a hydraulic arm using syringes and tubing View →
5 Build a simple circuit to power an LED using fruits View →
6 Design a wind-powered boat and test performance in a fan tunnel View →
7 Create an automatic light sensor switch from basic components View →
8 Build a model roller coaster and optimize for loop speed View →
9 Design a rain gauge and compare readings to a weather station View →
10 Build a homemade thermometer using alcohol and a capillary tube View →

Psychology & Social Science

10 Projects

# Project Idea Explore
1 Test whether color affects appetite and food preference View →
2 Study how background noise levels affect math quiz performance View →
3 Investigate whether people walk faster near shops or in parks View →
4 Test if peer pressure affects the answers on an opinion survey View →
5 Study whether font type affects reading speed and comprehension View →
6 Investigate whether mood affects creativity in drawing tests View →
7 Test how many items people can hold in short-term memory by age View →
8 Study whether smiling at strangers increases reciprocal smiling View →
9 Investigate the effect of breakfast type on morning concentration View →
10 Test whether physical exercise improves spelling test scores View →

Astronomy

10 Projects

# Project Idea Explore
1 Model how distance from the sun affects planetary temperature View →
2 Map the visible constellations from your location across seasons View →
3 Study the effect of moon phase on plant germination rates View →
4 Build a model orrery and demonstrate retrograde motion View →
5 Investigate how crater size relates to meteorite impact speed View →
6 Study the Doppler effect and relate it to redshift of galaxies View →
7 Track the movement of sunspots across the solar disk over a month View →
8 Build a sundial and compare accuracy to a digital clock View →
9 Study how light pollution affects the number of visible stars View →
10 Model the scale of the solar system using a football field View →

Health Science

10 Projects

# Project Idea Explore
1 Test whether different postures affect lung capacity using a spirometer View →
2 Study the effect of exercise duration on reaction time View →
3 Investigate which sports drink best restores electrolyte balance View →
4 Test the effect of sleep duration on memory recall test scores View →
5 Study the antibacterial properties of honey on bread mold View →
6 Investigate whether screen time before bed affects sleep quality via survey View →
7 Test whether stretching before exercise reduces muscle soreness View →
8 Study the effect of eating habits on afternoon energy levels View →
9 Investigate whether listening to music reduces perceived pain in ice water test View →
10 Test which sunscreen SPF actually blocks most UV using UV beads View →

Engineering & Design

10 Projects

# Project Idea Explore
1 Design and build the strongest possible spaghetti-marshmallow tower View →
2 Build a bridge from index cards to hold maximum weight View →
3 Design a parachute from household materials to minimize fall speed View →
4 Build an egg drop device and minimize impact force View →
5 Design a shock absorber from recyclables and test with a weighted cart View →
6 Build a model windmill and measure energy output vs wind speed View →
7 Design the most efficient water wheel blade shape using a stream View →
8 Build a model dam and test its ability to handle increased water flow View →
9 Design a floating raft from aluminum foil to hold maximum pennies View →
10 Build a trebuchet and study the relationship between arm ratio and range View →

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