If a balloon is filled with a substance that's less dense than air ... such as helium, hydrogen,
steam, or warmer air ... then the balloon is less dense than air.
Because it is a safe gas that is less dense than air, thus balloons float in air
helium is less dense than air. :) so helium will float better than air
Balloons can be filled with air (don't float), or with hydrogen or helium (float because the gas is less dense). Hot air balloons use burners to heat the air so that it becomes slightly less dense than the cooler air around it, providing some lift.
Balloons rise because the gas inside them is less dense than the surrounding air. When the gas molecules in the balloon are heated, they spread out, causing the balloon to become less dense and rise.
Helium is a gas that is less dense than air. This is why a balloon filled with helium rises when released.
Helium is less dense than air, and therefore the balloon will float.
polluntants
No. At the same pressure, a helium filled balloon will be less dense than an air-filled balloon.
Because helium is a less dense gas than a general air mixture
yes honey, that's why hot air balloons rise
Hot air balloons and thermal air currents are two things that use hot air to rise. The heating of the air makes it less dense, causing it to become buoyant and lift objects or create upward movement.
Heat makes air less dense and therefore rise.