Easy Science Fair Projects
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Science isn’t all beakers and equations – the following experiments test the scientific properties of soap bubbles! You’ll have to be a good bubble-blower to make these work!
Easy Science Fair Projects #1:
Bubble Survival Times
How long does the average large bubble last in the air? These are very easy science projects that will test whether adding different chemicals to the bubble mix will make the bubble last more or less time.
MATERIALS:
- 5 plastic cups
- stopwatch
- medium-large bubble-blowing hoop
- 500ml water
- 100ml dish soap
- 10ml corn syrup
- 10mg sugar
- 10ml glycerin (available at pharmacies)
- 10ml lemon juice
INSTRUCTIONS:
1. Come up with your hypothesis – will any of the added substances increase the length of time that the bubble stays alive? Which ones?
2. Label the cups as follows: soap, corn syrup, sugar, glycerin, lemon juice
3. In each cup, mix 100ml of water with 20ml of dish soap. Stir gently.
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5. Dip the hoop in one of the substances and blow a bubble. Start the stopwatch when the bubble leaves the hoop and stop it once it pops. If it pops by hitting another object, don’t count it.
6. Repeat until you have 10 measurements for each substance. Calculate the average measurement for each substance
7. Which substance lasted the longest, on average? Was you hypothesis confirmed?
*TIP: These easy science fair projects work best in a humid environment – this will cause your bubbles to last longer, enabling easier measurement
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Easy Science Fair Projects #2:
Air Conditions for Bubbles
More easy science fair projects using bubbles! In this case, our variable is not the substance making up the bubble, but the chemicals in the surrounding air.
MATERIALS:
- Empty aquarium
- Aquarium lid, baking sheet, or plastic tray
- 500ml of water
- 100ml of dish soap
- 200ml of vinegar
- 100ml of sodium bicarbonate (baking soda)
- 1 large cup
- 1 large bowl
- stop watch
- medium-large bubble-blowing hoop
INSTRUCTIONS:
1. Come up with your hypothesis – do you think that bubbles will stay afloat longer in carbon dioxide or air? Why?
2. Start by blowing bubbles into the empty aquarium. Begin with the hoop as close to the rim of the aquarium as possible, then start the stopwatch when the bubble leaves the hoop. Stop the bubble when it touches the bottom. If it pops against a wall, don’t count it.
3. Record the time it takes for 10 bubbles to sink to the bottom of the aquarium
4. Now place the bowl in the aquarium and mix together the vinegar and sodium bicarbonate in the bowl. It will immediately begin pouring out carbon dioxide. (Try not to breathe this gas in – it is not harmful, but it can make you cough)
5. If possible, cover the aquarium with the lid or tray to prevent gas from escaping
6. When the chemical reaction stops, repeat steps 2-3 with the aquarium full of carbon dioxide.
7. Was the average time longer or shorter the second time around? Was your hypothesis confirmed?
*TIP: You can add a third trial to these easy science fair projects by trying it with water vapor. Use a small humidifier to pump water vapor into the tank, then repeat the experiment
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