3rd Grade Science Fair Projects
experimental science project guides in this list
contain all the steps you need to start and
complete your science project. Information
include Introduction, Question/Purpose,
Variables, Sample Hypothesis, Sample Experiment
designs, guides in creating data table, Graph,
drawing Conclusion, writing an Abstract, writing
Report. Engineering and display projects may
have a different structure. ScienceProject.com
requires a membership that will cost you about
$25 to $35 each year.
General Science Projects
A Bell System
History of Shells
A Chemical Change
A Door Chime
How to Develop a Picture
How Traffic Signals Work
Inside a Cave, Make stalactite
Operation of a Doorbell buzzer
Parts of an Electric Motor
Minerals: Origin, Distribution
Make an Equatorial Sundial
A Weather Station
A Cotton Gin
A Wheat Elevator
Water Supports Heavy Weights
An Electromagnetic Crane
Parts of a Windmill
Machines Made Work Easier
Causes of the Seasons
How Hard are Various Types of Rocks and
Erosion - What causes erosion? - How can
soil erosion be prevented?
Make a Volcano Model
Make a Magnet
Make A Bird House
Insect Collection Display
Cotton Culture Display
How Old Are Trees
Make a Sundial
Make A Compass
Make Salt Crystals
How a Tooth Decays
Make Sugar Crystals
Insects: Bad Guys or Good Guys?
Draw A Magnetic Field
The Solar System
Parts of a Hen's Egg
Parts of a Horse (Display)
Parts of Birds (Display)
Do Plants Grow Toward Light?
What material and objects will be
attracted by magnet?
A Secret Letter with Invisible Ink
What is needed for fire to start?
The Sun, Moon and Earth (Make Model)
Carbon Dioxide and Man
How to Test Food for Starch?
How Do You Test If The Egg Is Cooked?
Best Packaging for an Egg
Make A Simple Electric Circuit
What Battery Last Longest?
Do Detergent Work Best In Cold or Hot
What causes the milk to spoil?
Which freezes faster? Water or Salt
Which freezes faster? Water or Sugar
What is the effect of light on a plants
What is the effect of salt water on a
What is the effect of sugar water on a
What is the effect of vinegar on plants?
What is the effect of oil on plants?
What color light is best for a plants
What factors affect the evaporation of
What is the effect of sugar or salt in
the evaporation of water?
Compare two dishwashing liquid to see
which one makes more bubbles.
Does the temperature of water affect the
time it takes for the water to freeze?
Identify counterfeit bills
Test Apple Maturity
Test fruits or fruit juices for starch
What is cotton candy?
A Tundra (Make a model)
Physics Science Projects
How metals compare in conducting heat.
Egg Floatation (buoyancy)
Are some substances more soluble than
How do Aeorplanes fly? What is the best
How Light is Affected passing through
water e.g. viewing objects under water,
formation of rainbows.
What limits the speed of a car, boat, or
Chemistry Science Projects
Chemical Change and the factors that
affect the rate such as heat. light and
Fire must have air to burn.
Biology Science Projects
Personal observations on life cycle
What attracts insects? light or heat?
plants and fertilizer
How pet mice respond to different types
of food (pellets, crushed, solid)
Why do plants grow towards light?
How water moves through the plant
How plants reproduce and factors that
affect the process
Why do plants move?
How do plants get nitrogen
Does gravity affect plant growth?
The importance of earthworms to soil and
The effect of soil components and
organic matter on growth of plants.
Plants and animal life in a creek or
Plants and animal life in a balanced
Other Science Projects
Understanding Electrical Conductors and
Demonstration of principals; how is
current affected by type of conductor,
temperature, filament, etc.
Principles of fluorescent lights; how do
they compare with filament bulbs, in
effectiveness and cost.
Air Movement - Is air in your house the
same temperature at floor level and near
the ceiling? How could you spread heat
more evenly through the house?
Dew - Does it form on clear or cloudy
nights? What other frost factors
increase the amount of dew? Can you
measure how much dew is formed in a
Temperature. - How does the temperature
change during the day? What time is
usually the warmest? Can you construct
your own thermometer to keep your own
Rain - How does a rain gauge work?
Measure the rainfall over a period of
time and compare it with the daily
weather reports. - Principles of cloud
seeding and other weather modification.
Most projects are for more than one grade and
selection depends on your previous knowledge
about the subject. Do not select projects that
you are not familiar with.