SI unit for force, or the scientist credited with formulating the laws of motion and universal gravitation
Subatomic particle with a positive electric charge and a mass slightly less than a neutron, found in the nucleus of an atom
An elementary particle that represents a quantum of electromagnetic radiation (of which light is a component)
An explosive force equal to that of one million tons of TNT - often used to refer to the explosive strength of nuclear weapons
The smallest part of a stem, root, or leaf, that, when removed from a plant, may grow into a new plant
Largest moon of Neptune, or the nucleus of a tritium atom (hydrogen isotope with one proton and two neutrons)
Element 36 on the periodic table - also one of the noble gases
A localized, mobile excited state of a crystal, consisting of an electron and an electron hole bound together - exists in insulators and semi-conductors
The theoretical quantum of gravitation, usually assumed to be a massless elementary particle with a spin of 2
A unit of magnetic moment, used in measuring the magnetic moment of atomic and subatomic particles
A mechanical figure or contrivance constructed to act as if by its own motive power (e.g., a robot)
An external (usually hard) covering that supports an animal's body
An internal framework that supports an animal's body
Another name for the unified atomic mass unit (AMU), based on the mass of a 12C atom, or the scientist who introduced atomic theory into chemistry
Passively floating or somewhat motile organisms occurring in a body of water, primarily comprised of microscopic algae and protozoa
An old and stable part of the continental lithosphere characterized by a thick crust and deep lithospheric roots (e.g., the Canadian shield)
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