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the act or faculty of knowing or sensing without the use of rational processes; it involves immediate cognition
a tentative explanation for an observation, phenomenon, or scientific problem, that can be tested by further investigation
a set of statements or principles devised to explain a group of facts or phenomena, especially one that has been repeatedly tested or is widely accepted and can be used to make predictions about natural phenomena
a schematic description of a system, theory, or phenomenon that accounts for its known or inferred properties and may be used for further study of its characteristics
any of the four fundamental ways in which elementary particles and bodies can influence each other
the interaction between charged objects that gives rise to the electromagnetic force
a composite, strongly interacting particle made up of three quarks; protons carry a positive electrical charge and is a constituent part of the nucleus of atoms
a composite, strongly-interacting particle made up of three quarks, but which carries no net electrical charge; neutrons area constituent part of the nucleus of the atom
the elementary particles of which protons and neutrons consist; a proton and neutron each consist of three quarks
a term referring to atoms whose nuclei can spontaneously change under the influence of the weak nuclear force
an elementary particle in atoms having a negative charge; electrons are located outside atomic nuclei
a substance composed of atoms that have an identical number of protons in each nucleus; elements cannot be reduced to simpler substances by normal chemical means
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