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L7&L8 Matter Overall

L7&L8 Matter Overall Assessment

QuestionAnswer
Chemical reaction Process in which one or more new substances form from one or more other substances
Reactant Substance that exists before a chemical reaction takes place and changes as a result of the reaction
Product New substance that forms during a chemical reaction
Chemical Equation Shorthand notation made up of arrows and chemical formulas for reactants and products that summarizes what happens during a chemical reaction
Law of Conservation of Matter Scientific law stating that matter cannot be created or destroyed
Scientific law Verbal or mathematical description of a natural phenomenon that does not explain the phenomenon.
Matter What cannot be created or destroyed during a chemical reaction?
Before and after One way to know if a chemical reaction has taken place is to measure the mass when?
Equal to The mass before the reaction should be ______________ the mass after the reaction.
mass of the products The mass of the reactants should be equal to the ____________________.
Atoms rearrange Breaking apart and joining in a new way
Exothermic reaction Chemical reaction that releases more energy to the surroundings than it absorbs
Endothermic reaction Chemical reaction that absorbs more energy from the surroundings than it releases
Prototype Full-scale, working model of a design that can be tested as part of the design process
Products of exothermic reactions will... getting hot, giving off light, making noise
Products of endothermic reactions will... feel cool/cold, temperature will go down
endothermic, energy is written on the _______ side of the chemical equation left, since it is going into the reaction
exothermic, energy is written on the _______ side of the chemical equation right, since it is coming out of the reaction
Engineers build, test and redesign prototypes to... perfect the design solutions, and have it meet all the criteria
4Fe + 3O₂ → 2Fe₂O₃ + energy this reaction is exothermic since energy is coming out of the reaction
NH₄Cl + H₂O + Energy → 2NH₄OH + HCl this reaction is endo thermic since energy went in as a reactant
Created by: Science6IMS
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