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If it's a normal balloon like the one you'd see at a birthday, it's because it's filled with helium which is lighter than the air around us (it's hard to imagine air has weight, but it does at a molecular level).
If you're talking about a hot air balloon, it floats because the air in the balloon is hotter than the air around it, and heat rises (again due to molecular-level activity).
Hope that helps!
What else can I help you with?
How long were hot air balloon invented?
Hot air ballons were invented in 19218237 a.d.If u read this post a commentif u dont then thats mean
Why cannot aircraft fly in space?
An aircraft is designed to fly in 'air' there is no 'air' in space.
Do hot air balloons cause air pollution?
Hot air balloons do not directly produce air pollution because they are powered by propane burners that combust the gas cleanly. However, the transportation and support vehicles used to operate hot air balloons can contribute to air pollution through emissions from their engines.
How does air make a balloon fly?
air is heavier than balloon, air rises
Why was hydrogen used for air balloons?
because it helps it fly in air
What does fredrickson use to make his house fly?
Ballons
What does MR fredrickson use to make his house fly?
Ballons
What does Mr fredrickson use to make his house fly up?
Ballons
Why can hot air balloons float?
which gas is in ballons
Why do helium-filled ballons raise in air?
Because helium is less dense than air.
What is a hot air ballons air pressure?
The hot air balloons air pressure is usually used to explain the principle of buoyancy.
Is an air balloon gas?
Non Helium ballons are just oxygen, or O2
What is the population of Ballons?
Ballons's population is 86.
Why don't balloons stay up in the air even though they have air or hellium inside?
Air can escape from the ballons even if there aren't holes in them.
What is the area of Ballons?
The area of Ballons is 17.23 square kilometers.
Why is removing air from balloon easier than removing air from bottle?
Ballons are made of an elastic plastic while a bottle in a harder plastic
Examples of objects that are buoyant?
Some examples are, hot air ballons, ships, bouys, actually just about anything that floats in air or water :p
