SCIENCE vocab. words
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Law of Conservation of Mass | that the mass that is in a closed system will remain constant regardless of how much time passes
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| Physical Change | once you change something you can also change it back
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| chemical change | once you change something, you cant change it back
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| Element | one of a class of substances that cannot be separated into simpler substances by chemical means
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| Chemical Formula | a representation of a substance using symbols for its constituent elements
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| Element (Diatomic) Molecule | when a molecule is used to make an element
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| Compound Molecule | when a molecule is used to make an element
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| Chemical Reaction | reaction
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| Reactants (in a chemical equation) | any substance that undergoes a chemical change in a given reaction.
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| Products (in a chemical equation) | . a substance obtained from another substance through chemical change.
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| Coefficient (in a chemical equation) | a number that is constant for a given substance, body, or process under certain specified conditions, serving as a measure of one of its properties
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| Subscript (in a chemical equation) | A subscript is mostly used in chemistry, when you write out something like H20 the 2 would be smaller and written under the letter slightly hence the "sub" part.
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