Because helium is lighter than air.
Helium is lighter than air. so balloons filled with helium will float in air
bcoz helium is lighter than air
Helium is lighter than air.
Helium is lighter than air. so balloons filled with helium will float in air. warming will make them float or rise up faster.
Helium is lighter than air. Hence balloons or blimps filled with helium will float.
Helium is lighter than air. So balloons or air ships filled with helium will float.
So that the balloons float
In helium balloons and blimps. Helium is lighter than air. So balloons or blimps filled with helium will float or rise up
Those balloons are filled with helium gas. Helium is lighter than air. Helium is a noble gas.
Because it is a safe gas that is less dense than air, thus balloons float in air
Helium is lighter than air and a balloon filled with helium may rise up.
Helium is lighter than air, hence balloons filled with helium will float and rise up.