Here are some popular science fair projects that give a lot of bang for the buck. Baking Soda and Vinegar Volcano This classic project uses baking soda, vinegar and red food coloring to simulate a volcanic eruption. You can make the body of the volcano out of clay or plaster.
Try to make it as realistic as possible, with a convincing magma chamber, conduit and crater. When you are ready, mix a cup of vinegar and a spoonful or two of baking soda in order to create a foamy flow of lava. Mentos and Soda Fountain This experiment is very easy to do, and is so fun it has been featured in a major TV ad and countless internet videos.
When you drop a roll of Mentos into a 2 liter bottle of soda, CO2 bubbles attach to the surface of the candy and grow as the candy dissolves. This creates a soda geyser almost instantly.
It will reach a height of about six feet, so yo may want to try this outdoors! Also, you may want to use diet soda to avoid stickiness. Sciencing Video Vault Invisible Ink There are many different solutions that can make for an effective invisible ink.
One of the most well-known is made from lemon juice. The juice of a lemon or two is likely to be enough: The invisible ink can be made visible just by heating it carefully over a candle for a few seconds. For something with a bit more of a high-tech flair you can use Quinine Sulfate tablets to make an ink that will only become visible under UV light.
Quinine sulfate is used for the treatment of malaria and is easy to find online. Crystal Growing There are many different techniques for having fun with crystals. One of the most colorful methods involves dropping metal salts like calcium chloride, lead nitrate or copper sulfate into a solution of sodium silicatebut you will need to borrow those from the school's chemistry lab.
If you would rather use off-the shelf materials for your crystal growing experiments, you can create a warm saturated solution with a crystal solute like salt, sugar, alum or aniline. Dip a bit of string into it and wait for it to cool off.
The particles in the solution will aggregate around the surface of the string and create tiny seed crystals.
After a few days you will have some gorgeous crystal formations. Vegetable Battery Vegetables do not have electricity per se, but they have electrolytes that can transport a current when sandwiched between two different metals.
The classic version of this experiment involves a lemon, a galvanized nail and a copper coin connected to a small light bulb or a LED, but you can experiment with different vegetables and different metals and record the results. If you want to make your results more precise and more "scientific-looking" you can use an inexpensive multimeter to measure the precise voltage produced.
Wind Energy Sustainable energy is all the rage these days, and you can build several simple experiments around the generation of wind energy. The rotor of a wind generator works on the same principles used by the humble pinwheel, so you can buy or make pinwheels of different sizes and different numbers of blades and look for the things that make them go slower or faster.
If you use an electric fan or a hair dryer, you can also stress-test the different designs and materials to see if some handle high speeds better than others. Water Electrolysis Hydrogen is another potential source of sustainable energy, and you can easily generate some by disintegrating water into its basic elements via an electrical current.
Take a large battery 9 Volts or aboveconnect wires to its terminals and dip them into salty water. You should see bubbles forming around the tips of the wires as the water breaks down into oxygen and hydrogen.
Try using different materials for the electrodes like nails, or the graphite from a penciland different additives for the water like vinegar, or distilled waterin order to achieve a more efficient process and generate more bubbles.10 Easy Science Fair Projects for Kids We teamed up with kid science guru Steve Spangler to get the coolest experiments you can try at home, including color-changing milk and a Mentos Diet Coke geyser.
Find hundreds of FREE science projects and activities for kids of all ages!
Some of our most popular projects include building a simple motor with a magnet, dissecting an owl pellet, and making a solar oven. PopSci is always on the lookout for today's best deals.
Our lists will be updated throughout the day, so check back to see if stumbled upon any awesome new discounts. Popular science fair projects for students and teachers. Books shelved as science-projects: Dinosaur Dilemma by Frank Cammuso, Robot Revolution!
by James Patterson, How Science Works by Judith Hann, Our Solar S. The holidays are fun for people, but they can be hard on your pets. Here's how to make sure your furry friends have the best holiday season possible.