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chapters 1 through 9

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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Question
Answer
Chemistry   the study of matter and the changes that it undergoes.  
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matter   anything that has mass and takes up space.  
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mass   a measurment that reflects the amount of matter.  
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weight   a measure not only of the amount of matter but also of the effect of Earth's gravitational pull on that matter.  
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scientific method   a systematic approach used in scientific study, whether it is chemistry, biology, physics, or other sciences.  
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qualitative data   information that describes color, odor, shape, or some other physical characteristics.  
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quantitative data   the numerical information that tells you how much, how little, how big, how tall, or how fast something is.  
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hypothesis   a tentative explanation for what has been observed.  
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experiment   a set of controlled observations that test the hypothesis.  
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independent variable   the variable that you plan on changing.  
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dependent variable   because its value changes in response to a change in the independent variable.  
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control   a standard for comparison.  
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model   a visual, verbal, and or mathematical explanation of experimental data.  
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theory   an explanation that has been supported by many, many experiments.  
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scientific law   a relationship in nature that is supported by many experiments.  
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pure research   seeks to gain knowledge for the sake of knowledge itself.  
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applied research   research undertaken to solve a specific problem.  
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technology   the practical use of scientific information.  
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base unit   a defined unit in a system of measurement that is based on an object or event in the physical world  
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second(s)   the SI base unit for time.  
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meter   the SI base unit for length.  
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kilogram   the SI base unit for mass  
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dereved unit   a unit that is defined by a combination of base units.  
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liter   the metric unit for volume equal to one cubic decimeter.  
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density   a ratio that compares the mass of an object to its volume.  
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kelvin   the SI base for temperature  
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scientific notation   expresses numbers as a multiple of two factors: a number between 1 and 10; and ten raised to a power or exponent.  
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conversion factor   a ratio of equivalent values used to express the same quantity in different units.  
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dimensional analysis   a method of problem-solving that focuses on the units used to describe matter.  
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accuracy   refers to how close a measured value is to an accepted value.  
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percision   refers to how close a series of measurements are to one another.  
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percent error   the ratio of an error to an accepted value.  
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signification figure   all known digits plus one estimated digit.  
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raph   a visual display of data.  
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substance   matter that has a uniform and unchanging composition.  
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physical property   a characteristic that can be observed or measured without changing the sample's compostion.  
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extensive properties   are dependent upon the amount of substance present.  
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intensive properties   independent of the amount of substance present.  
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chemical properties   the ablitiy of a substance to combine with or change into one or more other substance.  
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states of matter   three different forms of matter: solid, liquid, gas.  
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solid   a form of matter that has its own definite shape and vloume.  
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liquid   a form of matter that flows, has consistent volume, and takes the shape of its container.  
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gas   a form of matter that flows to conform to the shape of its container and fills the entire volume of its container.  
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Created by: kittyboo27
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