Alpha science classroom： Air Pressure Bottle Experiment

Have the kids ever wondered how water can be pulled through a straw? Or what happens to the air pressure when you rise in an airplane? Now, the alpha science classroom teaches kids to make the Air Pressure Bottle Experiment, which allows them to explore these questions with this terrific physical science experiment for kids. Help kids understand the function of a drinking fountain by learning about air pressure through this kid's science experiment phenomenon.

Alpha science classroom： Air Pressure Bottle Experiment，Supplies Needed

• Clear Plastic Bottle

• Balloon

• A Cup or Bowl

• Water

• Food Coloring

• Modeling Clay

• Straw

• A sharp Nail or Screw

Alpha Science Classroom: Air Pressure Bottle Experiment, Step-by-Step Tutorial

Step 1: First, kids poke a hole in a plastic bottle. A standard size water bottle (16-20 ounces) works well for this experiment, but if you really want to impress your guests, you can also use a larger 2-liter soda bottle.

No matter what type of bottle you use, it's best to partially empty the bottle a bit so you don't make a mess when you poke a hole in it.

Step 2: Kids need to reach 3/4 of the way up the bottle in this hole, so you don't need to pour a lot of liquid out of the bottle if you don't want to (though I poured all the water out just to be safe).

Poke a hole in the bottle with a screw

Then poke a hole in the side of the bottle with a sharp nail or screw. You want the hole to be big enough for the straw to go through, but no bigger so that air and liquid don't leak out of the bottle.

Step 3: After the kids have placed the straw into the bottle and sealed the hole, grab a straw and insert it into the hole in the bottle after making a nice hole in the top side of the bottle. I prefer to use a flexible straw to make it easier to adjust the angle when filling the drink, but any kind of straw should work.

Use some modeling clay or putty to seal the hole in the straw. Apply a generous amount of clay to the outside of the hole around the straw to make sure it holds the straw in place.

Step 4: The kids insert the straw into the hole. The key to this step is to make sure that a good enough seal is formed with the clay so that air and water can only escape through the straw and not through the hole the straw goes through.

Step 5: Kids fill the bottle with your favorite beverage. If you are using water in this experiment, it might be fun to add a little food coloring to make it more intuitive. Otherwise, fill the bottle about 3/4 of the way with water, soda, or any kind of beverage you like.

Pour water or your favorite beverage into the bottle

The goal here is to have the level of the liquid at the same level as the hole where the straw enters the bottle. If you want to fill the bottle to the top, you can also ...... As long as you trust the clay around the hole to seal without leaking

Step 6: Inflate the balloon, but don't tie it off yet, and inflate a large balloon to a size that you think will hold a lot of air, but not so much that the balloon will burst. The idea here is that the bigger your balloon, the more air pressure it will hold and the better the experiment will be.

Inflating a large balloon

Once you have added enough hot air to the balloon, twist the neck of the balloon a few times and hold it in place. This will help keep the air inside the balloon without having to tie it up.

Step 7: Children attach the balloon to the bottle and while keeping the neck of the balloon twisted and pinched to prevent air from escaping, slide the mouth of the balloon onto the opening at the top of the bottle.

Slide the mouth of the balloon over the bottle

You may need to stretch the mouth of the balloon a bit so that it goes over the mouth of the bottle. This is another reason why a larger balloon is better for this experiment, as it stretches better.

Step 8: The children let the air escape from the balloon to power the dispenser. Your balloon-powered drink dispenser is now ready to go. All you need to do is put a cup under the straw and unclip the neck of the balloon!

Unclip the neck of the balloon and let the air be pushed into the bottle

As the air from the balloon is pushed into the bottle, water (or whatever drink you choose) will begin to flow out of the straw and into the cup.

Finally, kids keep a few cups around as they do fill up quickly! If you need to stop the dispenser for a new cup, simply pinch the neck of the balloon and release it when you're ready to fill another drink

Alpha Science Classroom: Air Pressure Bottle Experiment, Scientific Principles

Alpha science classroom shows children that the air inside a balloon acts like a very high atmospheric pressure, forcing the water out of the bottle and through the straw.

In the wonderful world of weather, we know that high-pressure air masses always flow into low-pressure air masses. That's why if you're located between high pressure and a low-pressure system, there's usually wind!

The same principle of high-pressure air flowing into low-pressure air applies to this barometric cylinder experiment! For another cool way to demonstrate air pressure, check out the balloon in a bottle experiment.

The higher pressure inside the bottle is created by the balloon air rushing into the bottle. The high pressure inside the bottle then tries to escape to the low pressure outside, pushing the water through the straw!

When the neck of the balloon is pinched, the water no longer flows out of the straw because the air pressure inside and outside the bottle is equal and the forces are balanced.

For the power of air pressure, I believe that children have already understood through this simple children's physical science experiment activity, in fact, there are many mysteries of air pressure for human beings, alpha science classroom also hope that through different kid's science experiments activities, for children little by little to solve the various mysteries of air pressure, to help children learn scientific knowledge and become the most powerful scientists.

alpha science toys also prepare many amazing kits for children's physical science experiments, so that children can swim in the world of scientific treasures and grow up to be the happiest scientists.