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Phy Sci-1st Sem Fin

vocabulary words

science system of knowledge about the natural world and the methods used to find that knowledge
technology use of scientific knowledge to solve practical problems
scientific method organized plan used for gathering, organizing, and communicating information
scientific theory well-tested explanation for a set of observations or experimental results
scientific law statement that summarizes a pattern found in nature
element substance that can't be broken down into simpler substances
atom smallest particle of an element
solution mixture that forms when substances dissolve and form a homogeneous mixture
physical property any characteristic of a material that can be observed or measured without changing the composition of the substances in the material
chemical property any property that produces a change in the composition of matter
Charles' Law the volume of a gas is directly proportional to its temperature in kelvins if the pressure and the number of particles of the gas is constant
Boyle's Law states that the volume of a gas is inversely proportional to its pressure if the temperature and the number of particles are constant
phase change the reversible physical change that occurs when a substance changes from one state of matter to another
endothermic the energy a substance must absorb
exothermic the energy a substance releases
nucleus a dense, positively charged mass located in the center of an atom
proton positively charged subatomic particle that is found in the nucleus of an atom
electron negatively charged subatomic particle that is found in the space outside the nucleus
neutron neutral subatomic particle that is found in the nucleus of an atom
atomic number a unique number for each element that equals the number of protons in an atom of an element
periodic table an arrangement of elements in columns, based on a set of properties that repeat row to row
valence electron an electron that is in the highest occupied energy level of an atom
electron dot diagram model of an atom in which each dot represents a valence electron
ion an atom or group of atoms that has a positive or negative charge
chemical bond force that holds atoms or ions together
ionic bond force that holds cations and anions together
covalent bond chemical bond in which two atoms share a pair of valence electrons
alloy mixture of two or more elements, at least one of which is a metal
Created by: msparks