You can use soft drinks and food for more than consumption; they can be materials for science experiments. By using a combination of different sodas and foods, you can create a mini geyser, rubber chicken bones, a burp that you can catch and raisins that dance.
Diet Coke Geyser
You can make a geyser using a 2-liter bottle of Diet Coke and a roll of Mentos chewy mints. To create the geyser, unwrap the whole roll of Mentos. Place them in a rolled up piece of paper that is loose enough to funnel the mints into the bottle. Open the bottle of soda and pour the Mentos in. Stand back because the geyser will explode immediately and make quite the mess, so it is best done outside. This experiment shows a chemical reaction between the sugar in the mints and the carbonation in the soda.
Rubber Chicken Bones
Dark soft drinks are acidic. By creating rubber chicken bones, you can see the effect this acid has on calcium in the body, such as in the teeth and bones. According to nutritionists Michael Murray and Joseph Pizzorno, drinking significant amounts of soda leads to low calcium and high phosphate levels in the blood. When this occurs, calcium is pulled out of the bones. Low calcium levels in the bones can cause fragile bones, problems with bone development and osteoporosis. To demonstrate the effect that soda has on calcium, gather up some chicken bones left over from a chicken dinner. Leg bones work the best. Pour some dark soda, such as Coke, into a container. Place the chicken bones in the container and place a lid on it. Leave the chicken bones in the closed container for two or three days. Pull the chicken bones out of the container after the designated time to reveal their rubbery consistency. The chicken bones are turned from hard to rubbery because the acid in the Coke eats away at the calcium in the bone.
Catching Burps
Have you ever wondered why you have the urge to burp more when you drink soda? By using a 20-oz. bottle of soda, a teaspoon of salt and a balloon, you can see the result of the gas released into your digestive system when you consume a soft drink. To do this experiment, pour the teaspoon of salt into a dry balloon. Open the bottle of soda and place the neck of the balloon over the opening of the bottle. While holding the neck of the balloon onto the opening of the bottle, lift the balloon upright, pouring the salt into the bottle. Once the salt has fallen into the soda, the gas in the soda will be released, causing the soda to foam and fill the balloon with gas. The foam will turn back into liquid if you let the bottle and balloon sit for a couple of minutes. The gas in the balloon is the same gas that is released into your digestive system when you drink soda, causing you to burp.
Dancing Raisins
Raisins usually sink to the bottom of a glass when dropped into a liquid. However, with soda, you can make raisins rise and fall over and over in a glass, making them look like they're dancing. For this experiment you need a can of lemon-lime soda, such as Sprite or Sierra Mist, a box of raisins and a clear glass. Pour the can of lemon-lime soda into the glass. Then pour six or seven raisins in. Initially the raisins will sink to the bottom, but with time they will begin to rise up to the top of the liquid. This is due to the carbon dioxide gas bubbles in the soda attaching to the surface of the raisins and lifting them to the surface. After the raisins reach the top of the liquid, the carbon dioxide will release into the air above the glass and the raisin will drop. This experiment shows how gas is released and rises.
0 komentar:
Posting Komentar