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Hook an air pump to a soda bottle and copy this super cool experiment

Reusing empty soda bottles is a great way to reduce waste while learning something new. Each project features a 2-liter container used in a myriad of ways. From learning about the weather to creating an ecosystem, you'll be surprised at how many fun things you can do with such a simple tool.
Clean out those empty bottles and get ready to put your soda habit to good use. Keep reading to learn more.
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Bottle rocket
Check out Newton's Third Law of Motion (for every action there is an equal and opposite reaction) in motion. The air pressure pumped into the bottle pushes down on the water inside. When the pressure becomes too strong, the cork pushes out while the bottle pushes in the opposite direction, launching the rocket sky high.
Cloud in a bottle
This quick experiment speeds of cloud formation so you can watch it happen almost instantaneously. When the alcohol begins to evaporate, it acts as a dust particle. When the pressure is added and then released from the bottle, the water molecules (which are already in the air) quickly condenses, creating a cloud.
Floating rice bottle (h/t Housing a Forest)
Learn about the effect of friction and density with a little rice and some pencils. The pressure of the fluffed-up rice adds stress to the pencil and holds it in place so you can easily pick up the bottle with a writing utensil inside.
Bottle tornado
This classic science experiment illustrates that even though a bottle may appear empty, it contains something: air. When you create a vortex, the vortex disrupts the air, creating a mini-tornado and allowing the water to move from one bottle to the next.
Bottle rain gauge
A rain gauge is a fun way to keep tabs on how much precipitation you receive during a rainfall. You can also have kids check the amount of water in the container against the weather forecast.
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