It's a gas
The solid would be the basket and balloon, and the tanks holding flammable gas. The liquid is water vapor released by burning the gas. The gases are the fuel in the tank, and the heated air in the balloon that causes it to rise.
The solids will be the balloon and the basket, the propane burner and so on.The liquid part will be the condensation on the inside of the balloon resulting from the burning.The gas part is the hot air and the water vapour.[note. the water vapour (lighter than air!) provides some of the lift!]
In a hot air balloon, you will find air, which is a mixture of gases. The main gas used to inflate a hot air balloon is heated air, while the envelope of the balloon is typically made of lightweight and heat-resistant materials like nylon or polyester. Additionally, there might be minor traces of moisture or other particles present in the air inside the balloon.
No. A hot air balloon is a solid object. That is, the basket, the ropes, the burner and the envelope itself are not gasses. The air within the envelope is a gas, of course; heated atmospheric gasses in fact. But the balloon itself is not a gas.
A hot air balloon flies because it is filled with hot air. Hot air rises and causes the balloon to lift from the ground.
A hot air balloon flies because hot air inside the balloon is less dense than the cooler air outside. This temperature difference creates lift, allowing the balloon to rise and float in the air. By controlling the temperature of the air inside the balloon, the pilot can control the balloon's ascent and descent.
A hot air balloon is called such because it is filled with hot air to make it rise. When the air inside the balloon is heated, it becomes less dense than the surrounding cooler air, causing the balloon to float upwards.
A hot air balloon pilot is called an aeronaut.
The hot air inside the balloon expands, making the hot air balloon fly.
D: The hot air inside the balloon becomes less dense than the air outside the balloon.
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.