This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.

This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

Science fair project that determines how UV radiation emitted by the sun varies depending on the time of day, using a handheld UV detector

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

This science fair project idea creates an underwater habitat and explores the basic needs of living things under water.

This science fair project idea quantifies the effect of weather- in this case temperature and humidity- on musical instruments.

This science fair project explores how salt and sugar affect the melting rate of ice in water.

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.

Find out which part of a flame burns wood the fastest and also if this is true for all types of flames such as candle-flame, burners, and lighters.

Science fair project that tests the correlation between outdoor temperature or weather conditions and the number of visible stars at night.

This science fair project idea determines effective strategies to help students stay awake and attentive.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

Determine the relationship between the speed of a sound and the temperature of the air it passes through.

Determine whether a hot liquid cools off faster when liquid is added before or after a two minute wait.

Determine which seeds are most likely to survive harsh winter conditions (low temperatures).

Determine the differences between various bicep exercises, both in terms of how much muscle exertion they create and how they affect your heart rate.

This science fair project idea examines the actual cost of three household light bulbs by testing energy consumption.

Easy and cool middle school science fair project on ripening process of fruits and measures you can take to prevent fruits from rotting and delay ripening.

Store seeds under three different environmental conditions. Plant seeds in carefully marked groups, watch them grow. Compare results.

Science fair project that creates fog using bottles of hot and cold water.

Determine which metal has the highest rate of conductivity.

Science fair project which measures the amount of heat energy released by a burning candle by calculating how many calories of heat it emits.

Check out this cool middle school science fair project idea to determine if shopping carts are really carriers of harmful bacteria.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

Determine which environment keeps an ice cube frozen for the longest duration. Inspect and record your observations when cubes melt.

Measure temperature change over time using a variety of insulation materials. Be creative with insulation materials: scarves, yarn, socks, feathers, oil, etc

This science fair project idea determines which flower lasts the longest.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

Check out this fun science fair project idea to explore fun facts about fruit juices and learn why do juices turn bad in the fridge.