Vitamin D helps in the absorption of calcium from the intestines, essential for bone health and development.

Sublimation is the process where a solid directly converts to a gas. Dry ice (solid CO₂) is a common example.

O- blood type is the universal donor as it lacks A, B, and Rh antigens on red blood cells.

Sulfuric acid is H₂SO₄, one of the most important industrial chemicals with numerous applications.

Newton's Third Law states that for every action, there is an equal and opposite reaction.

Sand and iron filings form a heterogeneous mixture as their components remain visibly distinct and can be easily separated.

The Doppler effect describes the change in frequency or wavelength of waves when the source or observer moves relative to each other.

Concave lenses are used to correct myopia by diverging light rays to focus them correctly on the retina.

According to the Second Law of Thermodynamics, entropy (disorder) of an isolated system always increases over time.

Carbon dioxide (CO₂) is the primary greenhouse gas responsible for global warming. It traps heat in the atmosphere.