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test

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Question
Answer
anything that has mass and takes up space   matter  
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the study of the properties of matter and how matter changes   chemistry  
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a single kind of matter that is pure, meaning it always has a specific makeup—or composition—and a specific set of properties   substance  
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a characteristic of a pure substance that can be observed without changing it into another substance   physical property  
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a characteristic of a pure substance that describes its ability to change into different substances   chemical property  
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a pure substance that cannot be broken down into any other substances by chemical or physical means   element  
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is the basic particle from which all elements are made   atom  
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a force of attraction between two atoms   chemical bond  
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groups of two or more atoms held together by chemical bonds   molecule  
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a pure substance made of two or more elements chemically combined in a set ratio   compound  
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shows the elements in the compound and the ratio of atoms   chemical formula  
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made of two or more substances, elements, compounds, or both—that are together in the same place but are not chemically combined   mixture  
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A mixture in which pure substances are unevenly distributed throughout the mixture.   heterogeneous mixture  
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A mixture in which substances are evenly distributed throughout the mixture.   homogeneous mixture  
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an example of a homogeneous mixture   solution  
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a measure of the force of gravity on you   weight  
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the measurement of the amount of matter in the object   mass  
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The system of units (SI) used by scientists to measure the properties of matter.   International System of Units  
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The amount of space that matter occupies   volume  
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relates the mass of a material in a given volume   density  
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any change that alters the form or appearance of matter but does not make any substance in the matter into a different substance   physical change  
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A change in matter that produces one or more new substances   chemical change  
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has a definite shape and a definite volume   solid  
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Solids that are made up of crystals   crystalline solid  
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the particles are not arranged in a regular pattern   amorphous solid  
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has a definite volume but no shape of its own   liquid  
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meaning “a substance that flows.”   fluid  
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the result of an inward pull among the molecules of a liquid that brings the molecules on the surface closer together   surface tension  
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a liquid’s resistance to flowing   viscosity  
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A state of matter with no definite shape or volume.   gas  
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The change in state from a solid to a liquid   melting  
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The temperature at which a substance changes from a solid to a liquid; the same as the freezing point, or temperature at which a liquid changes to a solid.   melting point  
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The change of state from liquid to solid   freezing  
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The change from a liquid to a gas   vaporization  
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The process that occurs when vaporization takes place only on the surface of a liquid.   evaporation  
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occurs when a liquid changes to a gas below its surface as well as at the surface   boiling  
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The temperature at which a liquid boils   boiling point  
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The opposite of vaporization   condensation  
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occurs when the surface particles of a solid gain enough energy that they form a gas   sublimation  
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the very small center core of an atom   nucleus  
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have a positive electric charge (indicated by a plus symbol, +)   proton  
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have no charge   neutron  
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move rapidly around the nucleus and have a negative electric charge   electron  
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the number of protons in its nucleus   atomic number  
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Atoms with the same number of protons and a different number of neutrons   isotope  
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the sum of the protons and neutrons in the nucleus of an atom   mass number  
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may be a diagram, a mental picture, a mathematical statement, or an object that helps explain ideas about the natural world   model  
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the average mass of all the isotopes of that element   atomic mass  
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A chart of the elements showing the repeating pattern of their properties.   periodic table  
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A one- or two-letter representation of an element.   chemical symbol  
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