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SCIENCE-

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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The law of conservation of mass, also known as the principle of mass/matter conservation, states that the mass of an isolated system (closed to all matter and energy) will remain constant over time.   Law of conversation of mass  
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when you change the appearance of something but not chemically.   physical change  
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when you chemically alter something   Chemical change  
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a particle in matter that cannot be broken down any further.   Element  
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something that shows elements bonding   chemical formula  
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when a molecule has two of its own self   diatomic molecule  
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A molecular compound made of molecules - not ions. The atoms in the compound are bound together by shared electrons.   compound molecule  
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A chemical equation is the symbolic representation of a chemical reaction where the reactant entities are given on the left hand side and the product entities on the right hand side.   chemical equations  
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results of mixing more than two element together   chemical reactions  
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A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.   chemical reaction  
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effect from a cause   reactions  
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  productions  
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In science and statistics, validity has no single agreed definition but generally ... limit on the possible correlation between them (the so-called validity coefficient).   coeffient  
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