1) the smallest particle of matter a) radiation b) neutron c) atom d) nuclear fusion 2) a charged atom a) conduction b) ion c) atom d) proton 3) an atom with the same number of protons but different neutrons a) ion b) direct current (DC) c) isotope d) acids 4) a metal and non-metal a) ionic compound b) nuclear fission c) proton d) atom 5) non-metals only that share electrons a) proton b) half-life c) covalent compound d) nuclear fission 6) transfer of heat through solids by direct contact a) nuclear fission b) covalent compound c) conduction d) bases 7) transfer of heat in a circular motion in liquids and gases a) atom b) electromagnet c) convection d) proton 8) transfer of heat through electromagnetic waves a) radiation b) convection c) bases d) atom 9) used in homes - current flows both ways a) alternative current (AC) b) nuclear fission c) isotope d) ion 10) current flows in one direction a) nuclear fission b) proton c) ionic compound d) direct current (DC) 11) a temporary magnet where the magnetic field is created by an electric current flowing through a coil of wire, often wrapped around a magnetic material like iron a) half-life b) electromagnet c) convection d) alternative current (AC) 12) the time taken for the radioactivity of a specified isotope to fall to half its original value. a) ionic compound b) direct current (DC) c) half-life d) electromagnet 13) positively charge particle a) ion b) bases c) direct current (DC) d) proton 14) a particle with no charge a) direct current (DC) b) neutron c) radiation d) electromagnet 15) splitting of a large nucleus to small atoms a) nuclear fission b) neutron c) nuclear fusion d) covalent compound 16) combining of small atoms and only occurs in outer space. a) nuclear fusion b) proton c) ionic compound d) direct current (DC) 17) pH less than 7 a) convection b) radiation c) acids d) direct current (DC) 18) turns red litmus blue, pH more than 7 a) acids b) bases c) conduction d) atom

Physical Science Mid-Term Vocabulary 2

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