Barnett - 6th grade matter vocabulary
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| matter | anything that has mass and takes up space
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| energy | ability to do work or cause a change
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| chemistry | study of the properties of matter and how matter changes
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| substance | single kind of matter that has distinct physical and chemical properties
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| compound | substance made of two or more elements chemically combined in a set ratio or proportion
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| element | substance that cannot be broken down into any other substance by physical or chemical means
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| mixture | made of two or more substances (can be elements, compounds, or both) that are in the same place but are NOT chemically combined
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| atom | smallest unit of an element that keeps the properties of that element
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| nucleus | the tiny, central core of an atom, contains protons and neutrons
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| proton | small, positively (+) charged particle in the nucleus of an atom
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| neutron | small, uncharged particle in the nucleus
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| electron | tiny, negatively charged (-), high-energy particle that moves in the space around the nucleus
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| chemical bond | the force that holds two atoms together
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| molecule | two or more atoms that are bonded together
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| chemical formula | a shorthand way to represent a compound. Elements are indicated using symbols from the periodic table and the number is indicated with subscripts
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| chemical equation | a shorter, easier way to show chemical reactions, using symbols instead of words
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| subscripts | numbers in the formula that are written smaller and lower than the letters. They show the ratio of the atoms in a molecule
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| reactants | the materials at the beginning of a reaction. Written first in a chemical equation (what you start with)
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| products | the materials that are at the end of the reaction. Written after the arrow in a chemical equation. (what you end up with)
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| conservation of mass | matter cannot be created or destroyed
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