Science & Engineering Comparisons
Physics, biology, chemistry, and engineering principles — explained side-by-side, making complex topics accessible and clear.
All Science Comparisons
AC Current
vs
DC Current
Alternating current reverses direction periodically and powers electrical grids; Direct current flows in one direction and powers batteries and electronics.
Mitosis
vs
Meiosis
Mitosis produces two genetically identical diploid daughter cells for growth and repair; Meiosis produces four genetically unique haploid cells for sexual reproduction.
DNA
vs
RNA
DNA is double-stranded deoxyribose that stores genetic information long-term; RNA is single-stranded ribose that helps express and transport that information.
Speed
vs
Velocity
Speed is a scalar quantity measuring how fast something moves; Velocity is a vector quantity that includes both magnitude and direction.
Atom
vs
Molecule
An atom is the smallest unit of a chemical element retaining its properties; A molecule is two or more atoms chemically bonded together.
Convection
vs
Conduction
Convection transfers heat through bulk fluid movement (liquids/gases); Conduction transfers heat through direct molecular contact in solids.