Dalton
It consists of large molicules
all atoms are generally the same size, so "large atoms" would mean molecules.
The volume of the 6 cm sphere is 1.53 = 3.375 times as large.
This sphere would have a diameter of 3.368 units with a volume of 020 units3
jupiter
temperature humidity and pressure
In two dimensionscircles look like spheres. Any uniform polyhedron with a large number of sides looks something like a sphere.A sphere is a special case of an ellipsoid (where the three axes are equal), so ellipsoids can look like spheres. Another special case of ellipsoids is called a spheroid (where two axes are the same).
A very large sphere of aluminium
All atoms are elements. Single (or even a "few") atoms do not have the properties of large masses of atoms.
Air mass/masses
This is a very vauge question as it could refer to anything from the surface of the sun, to the Earth, to many things beyond the sun. 1) if by sphere you mean the sun, then the closest layer is that is not part of the sun is the plasma sphere. 2) if by sphere you men the Earth layers, then the Exosphere is the closest. 3) if by sphere you mean a body that is large enough to be considered a planet, the answer is Mercury, since the other bodies in the area maybe closer but they are not large enough to be sphere shaped.
Space