![]() Tape the two bottles together and quickly flip the bottles. Place the washer on top of the filled bottle, and place the empty bottle upside down on top of the washer. Fill one of the 2-liter bottles, 2/3 full of water. You can make a cool whirlpool by using two empty 2-liter soda bottles, a metal washer that has an opening smaller than the mouths of the bottles, and duct tape. You can also shine a laser pointer through the gelatin to see the light bend. Shine a flashlight through the gelatin to see the light broken up into its spectral colors. After the gelatin has dissolved, place the mixture into a small container and let it sit for 30 minutes to cool.Ĭut the gelatin into squares or prism shapes, which is half of a square or rectangle cut on the diagonal. Place the pot on the stove, and as the pot warms, stir the gelatin gently to dissolve it. Empty a packet of gelatin into a pot and add only half the amount of water listed in the gelatin package instructions. You can make a rudimentary prism with just distilled water and clear gelatin. You can also bind a plastic spoon with a rubber band to the top stick to make a bucket for holding your cannonballs. Steady your new catapult with one hand, and use your other hand to place a marshmallow on the top stick. Then, pull the two sticks slightly apart and slide the eight-stick bundle between them. Place them together and use a rubber band to hold the sticks together at the notch. On the two remaining sticks, use the scissors to make a small notch on each side of the stick. Stack eight popsicle sticks, and hold them together with rubber bands at each end. Marshmallows for cannonballs? How dastardly! To build this mini-catapult, you'll need at least 10 large popsicle sticks, a bunch of rubber bands, a pair of scissors, and some marshmallows for cannonballs. As the water cools, the solubility of the solution decreases, and the salt precipitates out of the solution and onto the wire to form crystals. This experiment works because of the temperature change of the water, and the solubility, the capability of the salt to be dissolved. After a few days, you should see spectacular crystals forming on the loop of the wire. Place the container in a warm spot and wait. Make a loop in the wire or pipe cleaner and lower the wire into the mixture. Add enough salt or Epsom salts to the water to create a saturated solution (the point when no more salt will dissolve in the water) and stir well. Fill the glass container at least half full with the hot water. First, heat the distilled water to a point just below boiling. You'll need some distilled water, salt or Epsom salts, a piece of wire or a pipe cleaner, and a glass container. This classic experiment takes few days to complete, but it's well worth the wait. However, once the salt dissolves in the water, the oil will rise again to the top of the container. The key to making the oil fall to the bottom is the salt, it binds to the oil, making it heavier than the water. Watch as beautiful colored orbs of oil gently fall to the bottom of the container.Īt first, the oil will stay at the top of the container because oil is lighter than water. Add some food coloring, then slowly pour one teaspoon of salt into the container. The Lava Lampįrom your kitchen, grab a bottle of vegetable oil, food coloring, some salt, and either a large glass or a glass jar.įill the glass container 2/3rds full of water and fill the remainder with vegetable oil. But, when the water in the balloon can't absorb any more heat from the candle, the balloon will burst, and you'll probably get a little wet. The water in the balloon disperses the heat generated by the candle, and keeps the latex of the balloon from getting hot enough to break. This is due to water's incredible ability to absorb heat. Light the candle, then slowly lower the balloon over it. Fill the balloon three-quarters full with water, and top it off with air by blowing the balloon up as far as it will go. Amaze Your Friends With a Fireproof Balloonįor this experiment, all you need is a balloon and a candle.
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