A Fun Home School Science Experiment in Aerodynamics – Hot Air Balloon


If you’ve ever noticed a bird flying, you’ll see how it uses the inherent ability to properly use aerodynamic forces to fly high in the sky and glide through the clouds tirelessly and effortlessly. I use these principles in a myriad of exciting experiments homeschool science, some of which I will share here.

These 4 aerodynamic forces are thrust (the force that makes a bird go out), pull (force resistance of the bird must be minimized), lift (the force that makes the bird rise high) and gravity (the force that pulls the bird down) . A slight imbalance in the above and below the flight was not as graceful.

It is important to note that the value of lift and thrust generated when the birds flap their wings. They also lift while gliding against the current wind by tilting the front edges of the wings to make a difference in air pressure. Drag is minimized by the aerodynamic shape of the bird’s body. Also, birds hollow bones, making them lighter and reduce the influence of gravity. I will share some of your favorite homeschool science my efforts here to show how things increase in the air and why flying objects will be light in weight.

Airplanes and rockets are designed with these principles in mind. One or more of the above forces are dominated by the collapse of the flying object. Even if you and I had wings, we would not be able to fly from our bodies are not aerodynamically shaped and are heavy.

Now that you have learned something about aerodynamics, let’s have fun with balloon experiment. If you’ve ever been in a hot air balloon, you will notice that the pilot adjusts the burner in order to make the balloon go up and down. He also uses the winds, caused by differences in air pressure, to move from place to place. Let’s make our own hot air balloon with a garbage bag.

Hot Air Balloon Experiment Open up a garbage bag and make a very narrow mouth with duct tape. Make sure that after a hole to fill in the hot air. Now run hair for a few seconds until it blows hot air to fill the bag with hot air. Now turn on the hairdryer and drop the bag. The bag begins to rise towards the ceiling, where it stays for some time.

Hot air is less density. This means that there are fewer air particles inside a hot air balloon relative to the outside atmosphere. Therefore, it is less air pressure inside the hot air balloon based on the outside air. This makes the balloon rises.

tissue parachutes Take four pieces of thin string or sewing thread equal length. Tie the thread to the four corners of the paper. Tie the free ends of the four strings to a piece of stick. Prepare many such parachutes with different weights attached. Now drop them one by one from the balcony. Notice how fast one in the ground.

Do you realize now why it is important for birds and planes to be light in weight?

the free “Homeschool Parent Guide to teaching science” is filled with great science experiments and activities. Get your copy by clicking on the link below.


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