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Unit B / Ch. 2

Science Terms / Unit B / Chapter 2

TermDefinition
3 states of matter solid, liquid, gas
Particles in a solid are __ close together and can only vibrate
Particles in a liquid are __ farther apart and move more freely
Particles in a gas are ___ far apart and free to move in any direction
evaporation the change of state from liquid to gas at the surface of a liquid
condensation the change of state from a gas to a liquid
solvent a substance that dissolves other materials
solute a substance that is dissolved
dilute describes a solution with a small amount of solute compared to the amount of solvent
concentrated describes a solution with a large amount of solute compared to the amount of solvent
reactant a substance that undergoes a chemical reaction often by combining with another substance
product a substance that is formed in a chemical reaction
exothermic reaction a chemical reaction in which more energy is given off than is taken in
endothermic reaction a chemical reaction in which more energy is taken than is given off
formula arrangement of symbols that shows both the kinds and number of atoms in a compound
chemical equation an arrangement of symbols and formulas used to show what happens during a chemical reaction
acid a compound that releases hydrogen ions in water
base a compoiund that releases hydroxide ions when dissolved in water
pH scale a set of numbers between 0 and 14 used to measure the strength of acids and bases
indicator a substance that changed color at a certain range of pH values
nutralization a process in which an acid and a base react to produce a salt and water
Created by: lleahy
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