Testable questions are about changing one thing to see what the effect is on another thing. They can be answered through hands-on investigation. Usually this involves measurement. Measurement involves some kind of NUMBER.
Testable questions can take a few forms:
- How does _________________________ affect _______________________?
- How does changing _________________________ affect __________________________?
- How does the type of ________________________ affect __________________________?
- How does the amount of _____________________ affect _________________________?
Amount, Measurement, Numbers
Testable questions usually involve finding a number, amount, or measuring something.
Examples of Testable Questions
How does the type of light affect how quickly a plant will grow?
Does the type of liquid given to a plant affect its growth?
How does the type of wood affect how long it burns?
How does the amount of light affect the rate of seed germination?
Do mint leaves repel ants, worms, or isopods?
What is the effect of increased or decreased oxygen on plant growth?
Does the direction seeds are planted affect plant growth?
What is the effect of different amounts of chlorine on plant growth- large amount, small amount, or no chlorine?
What is the effect of different amounts of air movement on plant growth?
Which stays fresher longer: organic or non-organic fruit?
Are you interested in plants?
Flowers, soil, green beans, succulents?
Examples of Testable Questions
How does the type of light affect how quickly a plant will grow?
Does the type of liquid given to a plant affect its growth?
How does the type of wood affect how long it burns?
How does the amount of light affect the rate of seed germination?
Do mint leaves repel ants, worms, or isopods?
What is the effect of increased or decreased oxygen on plant growth?
Does the direction seeds are planted affect plant growth?
What is the effect of different amounts of chlorine on plant growth- large amount, small amount, or no chlorine?
What is the effect of different amounts of air movement on plant growth?
Which stays fresher longer: organic or non-organic fruit?
Are you interested in the weather?
clouds, rain, fog, rainbows, storms
Examples of Testable Questions
How does the type of light affect how quickly a plant will grow?
Does the type of liquid given to a plant affect its growth?
How does the type of wood affect how long it burns?
How does the amount of light affect the rate of seed germination?
Do mint leaves repel ants, worms, or isopods?
What is the effect of increased or decreased oxygen on plant growth?
Does the direction seeds are planted affect plant growth?
Are you interested in animals?
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Are you interested in buildings & structures?
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Are you interested in machines?
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Are you interested in electricity?
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Are you interested in liquids?
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Are you interested in light?
Examples of Testable Questions
How does the amount of sunlight (for a given length of time) affect the color of construction paper?
Are you interested in computers?
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Are you interested in environmentalism?
Examples of Testable Questions
What type of soil filters polluted water the best?
What is the effect of a magnetic field on plant growth?
Are you interested in food and baking?
Examples of Testable Questions
What type of soil filters polluted water the best?
What is the effect of a magnetic field on plant growth?
Are you interested in magnets?
Examples of Testable Questions
What type of soil filters polluted water the best?
What is the effect of a magnetic field on plant growth?
4. Write down several questions in your notebook.
5. Pick the question that you are most interested in.
Science Fair Ideas 