“…every kid starts out as a natural-born scientist.”Carl Sagan
By allowing children to conduct experiments themselves, ask questions, search for the answers, and collect and analyze data, we are enabling them to be active learners and more inquisitive students.
The vegetable oil floats on top of the water because it is less dense (or lighter) than water. The food coloring has the same density as the water… so it also sinks beneath the oil and the color mixes with the water. Alka Seltzer is a headache medicine that has an acid and a base in it. When those acids and bases mix in water, it causes the Alka Seltzer to fizz up, create bubbles, and make carbon dioxide. When the Alka Seltzer tablet sinks into the water, it starts to dissolve and carbon dioxide, which is a gas that is lighter than water. So, the gas bubbles float up to the top of the bottle. These gas bubbles carry up some of the colored water with them to the top. When the gas bubble reaches the top, the air comes out of the bubble and the colored water gets heavy again and sinks back down. This will happen until the Alka Seltzer tablet is completely dissolved.
Milk is made up of water, fats, and proteins. Food coloring is less dense than the milk, so it floats on top of it. The fat in the milk is all connected together with bonds. Dish soaps are used to clean dirty dishes because it is made to break up the bonds in fats allowing them to separate. So, when you add dish soap to your milk, the fats separate making the milk move and create your magical milk art!
Supercooling a liquid means chilling it to below its normal freezing point without turning it into a solid. By shaking the soda before placing it in the freezer, carbon dioxide molecules are coming out of the liquid solution (the soda), which increases the pressure inside the bottle. The increased pressure causes the bottle’s freezing point to drop below its natural freezing point, allowing the soda to remain a liquid. However, once you remove the bottle from the freezer and open it up to release the pressure that has been built up, the freezing point returns back to its natural freezing point. However, it needs something that ice crystals can grow on. So, by pouring the soda onto an ice cube (or by adding an ice cube after pouring the soda), it causes the soda to instantly freeze, leaving you with a slushie!
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