Forces of Attraction
Air
- Air is a mixture of gases that make up our atmosphere.
- It is composed mainly of nitrogen (78%) and oxygen (21%), with trace amounts of other gases.
- The forces of attraction between the molecules of these gases are relatively weak compared to solids and liquids.
- The molecules in air are constantly moving and colliding with each other, which is why air is considered a fluid.

Sand
- Sand, on the other hand, is a solid material made up of small rock and mineral particles.
- The forces of attraction between the particles in sand are much stronger than those in air.
- These forces of attraction hold the particles together and give sand its solid structure.
- The particles in sand are not moving as freely as the molecules in air, as they are held in place by these strong forces.

Order of Forces of Attraction
- Therefore, the correct order of forces of attraction from weakest to strongest would be:
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In conclusion, the forces of attraction between molecules in air are weaker compared to those in solid materials like sand. This difference in the strength of forces determines the physical properties of these substances and how they behave in different conditions.