Items

• mechanics

  The branch of physics concerned with the behavior of physical bodies under the influence of forces or displacements.
• medium

  A material or substance through which a wave travels (e.g., air for sound, glass for light).
• meson

  A subatomic particle made of one quark and one antiquark, bound by the strong force; they are unstable and exist in high-energy environments.
• metal

  A class of elements characterized by high electrical and thermal conductivity, malleability, ductility, and a tendency to lose electrons to form positive ions.
• meteorite

  A fragment of a meteoroid or asteroid that survives passage through Earth’s atmosphere and impacts the surface.
• method

  A systematic procedure or approach used in scientific investigation, experimentation, or problem- solving.
• microscope

  An optical instrument that magnifies small objects, allowing detailed observation of structures not visible to the naked eye.
• microscopic

  Describing objects or phenomena that are too small to be seen without magnification.
• microwave

  Electromagnetic radiation with wavelengths between infrared and radio waves, used in communication, radar, and cooking.
• minimum

  The smallest value in a set or function; in physics, it can refer to the least energy, position, or quantity.
• mirror

  A surface that reflects light in a predictable manner, typically with a smooth and polished surface.
• mode

  A particular state or pattern, such as a vibrational mode, or the most frequently occurring value in a data set.
• model

  A simplified representation of a system or phenomenon used to explain, predict, or simulate behavior in science.
• modulus

  A constant that quantifies a material's response to stress, such as Young’s modulus (elasticity), bulk modulus, or shear modulus.
• mole

  A unit in chemistry representing 6.022 × 1023 Particles (Avogadro’s number), used to quantify atoms, ions, or molecules.
• molecule

  A group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.
• molten

  Describes a substance, usually metal or rock, in a liquid state due to high temperature.
• momentum

  A measure of motion of an object, defined as the product of mass and velocity (𝑝 = 𝑚𝑣). It is conserved in isolated systems.
• monochromatic

  Describes light or electromagnetic radiation of a single wavelength or color.
• monopole

  A hypothetical particle or object with a single magnetic pole (north or south), unlike common dipole magnets.
• moon

  A natural satellite that orbits a planet; Earth’s moon is a key subject in astronomy and planetary science.
• motion

  The change in position of an object over time, described in terms of displacement, velocity, and acceleration.
• multiple

  A number that can be evenly divided by another number; in science, can refer to repeated quantities or harmonics.
• multiply

  To combine or increase quantities through multiplication; used in scaling, equations, and unit conversions.
• muon

  A heavy, unstable elementary particle similar to the electron, but with greater mass; part of the lepton family.