A Chinese lantern is a good model. A lightweight enclosed 'envelope' with a heat source suspended below it.
air is heavier than balloon, air rises
A hot air balloon is called an hot air balloon because, the inside is heated up to make it less dense, allowing it to rise. Meaning, your heating up the air inside the balloon, hence, the name: Hot air balloon.
For a hot air balloon science project, you can create a small-scale model using materials like tissue paper, glue, a straw, and a small basket. Show how heating the air inside the balloon with a hairdryer causes it to rise. You can also experiment with different temperature air or sizes of balloons to see how they affect the flight.
To make a hot air balloon go higher, the pilot will increase the temperature of the air inside the balloon by firing the burner. As the air inside the balloon becomes hotter and less dense than the surrounding air, it will create more lift, causing the balloon to rise. Adjusting the temperature and amount of hot air allows the pilot to control the balloon's altitude.
The hot air balloon has a basket in the middle, which holds passengers and the pilot. The basket is attached to the envelope of the balloon, where hot air is used to generate lift and make the balloon float.
The hypothesis of a magic balloon project, as with any project depends on what you are trying to prove from your experiment. If you were trying to prove that a certain kind of balloon stretches farther than another type, your hypothesis would state that.
You could name it, The Burning Hot Air Balloon:)
air is heavier than balloon, air rises
A hot air balloon is called an hot air balloon because, the inside is heated up to make it less dense, allowing it to rise. Meaning, your heating up the air inside the balloon, hence, the name: Hot air balloon.
You could make a papier-mache air plane.
A balloon needs hot air to make it rise because hot air is less dense than cold air. When the air inside the balloon is heated, it becomes lighter and causes the balloon to lift off the ground and float in the air.
Simple...hot air rises..
For a hot air balloon science project, you can create a small-scale model using materials like tissue paper, glue, a straw, and a small basket. Show how heating the air inside the balloon with a hairdryer causes it to rise. You can also experiment with different temperature air or sizes of balloons to see how they affect the flight.
Heating the air in the balloon makes it less dense than the surrounding air, causing the balloon to become buoyant and rise. As the air inside the balloon cools, it becomes denser and the balloon descends. This process allows the pilot to control the altitude of the balloon.
To make a hot air balloon go higher, the pilot will increase the temperature of the air inside the balloon by firing the burner. As the air inside the balloon becomes hotter and less dense than the surrounding air, it will create more lift, causing the balloon to rise. Adjusting the temperature and amount of hot air allows the pilot to control the balloon's altitude.
The hot air balloon has a basket in the middle, which holds passengers and the pilot. The basket is attached to the envelope of the balloon, where hot air is used to generate lift and make the balloon float.
Helium is lighter than air. So helium balloon rises in air.