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science test C68

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
physical change   something that changes it's size, shape or state of material  
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chemical change   is any change in which new substances are formed  
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model   is a way to represent an object or describe how a process takes place  
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nucleus   most of an atom's mass is contained in a central core  
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proton   particle that has a positive electric charge  
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neutron   particle that has no electric charge  
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elctron   particle that has negative electric charge  
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atomic number   number of protons in an atom of that element  
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ion   electrically charged atom  
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radioactive element   made up of atoms whose nuclei is broke down or decay into other atoms  
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nuclear fission   splitting nuclei  
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indicator   substance that changes color when mised with acid or base  
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neutralization   reaction between acid and base  
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salt   is a compound that can be formed when an acid reacts with a base  
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polymer   proteins is an organic compound that contains a very loing chain of carbon compounds  
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Created by: AAhue
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