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A system of measurement based on the number 10 


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International System, abbreviated SI, is used as units to measure length, volume, mass, density, temperature, and time. It allows scientist to share and compare their work. 


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Mass is a measure of the amount of matter an object contains. 


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Weight is a measure of the force of gravity acting on an object . 


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Volume is the amount of space an object takes up. 


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Meniscus is a curve that determine the volume of water. 


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Density is a measure of how much mass is contained in a given volume. 


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An estimate is a approximation of a number based on reasonable assumtions 


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Accuracy refers to how close a measurement is to the truth. 


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Precision refers to how close a group of measurements are to each other. 


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Significant figures refers to the digits in a measurement. 


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Percent error calculations are used to determine how close or how accurate the true value is. 


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The mean or numerical average, is calculated by adding up all the numbers and then dividing. 


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The median is the middle number in a set of data. 


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The mode is a number that appears most often in a list of numbers. 

