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Last-moment SCIENCE FAIR PROJECTS
Speedy Stalactites
How Hot!
- Category: Last-moment SCIENCE FAIR PROJECTS
Chemistry can be pretty hot, too! An exothermic reaction is one that releases energy in the form ofheat. When vinegar reacts with steel wool, it can chemically remove theprotective coating on the steel wool, allowing it to rust. During the rustingreaction, iron combines with oxygen in the air. Is this a "hot"reaction? Find out!
Read more...How Cold!
- Category: Last-moment SCIENCE FAIR PROJECTS
Chemistry can be pretty cold. An endothermic reaction is one thathas to absorb energy, usually in the form of heat, in order to proceed. Thismeans that the temperature of the reaction drops. When the citric acid in lemonjuice reacts with baking soda, the reaction can really cool things down.
Key word
Read more...Vampire Suds
- Category: Last-moment SCIENCE FAIR PROJECTS
The world is full of acids and bases. Lemonjuice is an acid; bleach is a base; vinegar is an acid; baking sodais a base—the list goes on and on. Some chemicals can tell us whether aparticular substance is acidic or basic. These chemicals are called indicators, and they often change colors inthe presence of an acid or base.
Read more...Into (Mostly) Thin Air
- Category: Last-moment SCIENCE FAIR PROJECTS
Safety Warning
Read more...How Much Vitamin C?
- Category: Last-moment SCIENCE FAIR PROJECTS
It is important to get enough vitamin C in yourdiet. But which juices give you the most vitamin C? And do vitamin-fortifiedjuices really give you more for your money? By using a chemical reaction thatchanges color when there is a certain concentration of vitamin C, you can rankthe vitamin C content of different juices.
When iodine is mixed with a starch solution, itturns a deep purple-blue color. When enough vitamin C is added, the purple-bluecolor disappears. The lower the amount of juice required to make thepurple-blue color disappear, the more vitamin C there is in that juice.
Read more...Mini-Rocket
- Category: Last-moment SCIENCE FAIR PROJECTS
Combining chemistry and physicscan give you an explosive effect.
Read more...Glue-y Gooey Slime
- Category: Last-moment SCIENCE FAIR PROJECTS
Polymers are special compounds made oflong chains of molecules They are often rubbery and stringy—rubber bands are agood example of polymers in action. You can make polymers at home using somesimple ingredients. Have some gooey fun with glue!
Read more...Carton Turbine
- Category: Last-moment SCIENCE FAIR PROJECTS
A turbine is a kind of machine thatrotates. Often turbines are powered by steam, gas, or wind. This turbine willturn powered by water and gravity.
Read more...Underwater Fireworks
- Category: Last-moment SCIENCE FAIR PROJECTS
This experiment isn't reallyabout fireworks, but the burst of color you will create will look a lot likefireworks. Using a bit of food coloring and oil, you can create firework-likeeffects in a tall glass of water. The bursts happen because of how foodcoloring wants to react when it comes into contact with water.
If you've ever dropped a bit offood coloring into water, you've noticed that the color begins to spread almostimmediately. This spreading process is called diffusion. On the other hand, if you'veever dropped a bit of oil into water, you've noticed that the oil never mixeswith the water—the two liquids are immiscible. In this experiment, by mixingthe food coloring with oil before you drop it in the water, you give the foodcoloring a waterproof shield—for a moment. As the oil and food coloring shiftagainst each other, the food coloring eventually finds a hole in the shield andcomes into contact with the water. Then, the color comes bursting out!
Read more...Spud Power
- Category: Last-moment SCIENCE FAIR PROJECTS
Potatoes are yummy, but they are also electric! Potatoes contain phosphoric acid, which can be used as an electrolyte to make a battery. All you haveto do is provide two electrodes (a penny and a galvanized nail will work), somewiring, and a small lightbulb.
The phosphoric acid in the potato starts achemical reaction between the copper in the penny and the iron in the nail. Electrons begin to flow, creating an electrical current that flows through thewires and lights the bulb.
Read more...Levitaiion
- Category: Last-moment SCIENCE FAIR PROJECTS
Raisin Dance
- Category: Last-moment SCIENCE FAIR PROJECTS
Drop some raisins into a glassof club soda and watch them magically dance around! Actually, there's no magichere—the raisins fall down because they are denser than the club soda, but whenbubbles from the soda attach to the raisins, the buoyancy of the raisins changes. Withenough attached bubbles, a raisin can actually float—until, of course, thebubbles float off.
Read more...Gelatin Mountains
- Category: Last-moment SCIENCE FAIR PROJECTS
Staticelectricity, which is what makes your socks stick to other clothes in the dryer, can be apowerful force. When you rub a piece of wool on a latex balloon, the balloonbecomes charged with static electricity. If you hold the charged balloon near apile of unflavored gelatin, the gelatin becomes charged as well, but with theopposite charge. Things that have opposite charges attract, so the gelatinstarts to creep toward the balloon, trying to make contact.
Read more...Full of Hot Air
- Category: Last-moment SCIENCE FAIR PROJECTS
When air inside a closedcontainer is heated, the air molecules begin to move more quickly and exert a pressure on the sides of the container. In effect, hot air expands, and when that hot air is enclosed in a flexiblecontainer—such as a marshmallow—it can push against the container enough tomake the container expand as well.
Read more...Juice Rocket
- Category: Last-moment SCIENCE FAIR PROJECTS
Down the Ramp
- Category: Last-moment SCIENCE FAIR PROJECTS
Procedure
Read more...Cool Ocean, Hot Land
- Category: Last-moment SCIENCE FAIR PROJECTS
If you've ever walked along a beach in thesummer, you may have noticed that the sand is much warmer than the ocean water, even though the temperature outside is the same for both. Why does one gethotter than the other? The answer has to do with how different substances takeup and store heat, a property called specific heat capacity. Some Materials heat up quicklyand cool down quickly, while others take a long time to heat up but also take along time to cool down.
Key word
Read more...Yeast Fermentation
- Category: Last-moment SCIENCE FAIR PROJECTS
The yeast that is used to bake things such asbread is actually a live microorganism. When yeast microbes feed on sugars, they oftenundergo a process called fermentation, which produces energy for theyeast as well as alcohol and carbon dioxide gas as by-products. In a closedcontainer, such as a bottle sealed by a latex balloon, the carbon dioxide gascan be collected as the balloon inflates.
Fermentation is not the only process that yeastmicrobes use to make energy. In fact, fermentation only occurs when yeastmicrobes are cut off form a source of oxygen, such as when they are in a closedcontainer. When yeast microbes use oxygen and sugars, they undergo aerobicrespiration, which also produces energy. During aerobic respiration, however, instead ofalcohol being produced, the by-product is water.
Read more...Mini-Lightning
- Category: Last-moment SCIENCE FAIR PROJECTS
