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Math Expressions Unit Three Vocabulary Words Unit Three Vocabulary Inch (in.) A customary unit used to measure length. 12 inches = 1 foot Foot (ft.) A customary unit used to measure length. 1 foot = 12 inches Ruler A tool used to measure length. 1 2 3 Line Segment A part of a line. It has two endpoints. Cup (c) A customary unit used to measure liquid volume. 2 cups = 1 pint 4 cups =1 quart 16 cups = 1 gallon Fluid Ounce (fl oz) A unit of liquid volume in the customary system that equals 1/8 cup or 2 tablespoons . Pint (pt) A customary unit used to measure liquid volume. 1 pint = 2 cups Quart (qt) A customary unit used to measure liquid volume. 1 quart = 4 cups Gallon (gal) A customary unit used to measure liquid volume. 1 gallon=4 quarts=8 pints=16 cups Liquid Volume A measure of how much a container can hold. Also called capacity. Liter (L) A metric unit used to measure liquid volume. 1 liter= 1,000 milliliters Milliliter (mL) A metric unit used to measure liquid volume. 1,000 milliliters = 1 liter Weight A measure of how heavy something is. (Weight varies because weight is the effect of gravity on matter; mass is constant.) Pound (lb) A customary unit used to measure weight. 1 pound = 16 ounces Ounce (oz) A customary unit used to measure weight. 16 ounces = 1 pound Mass The amount of matter in an object (Mass is constant; weight varies because weight is the effect of gravity on matter.) Gram (g) A metric unit of mass. 1 paper clip = 1 gram 1,000 grams = 1 kilogram Kilogram (kg) A metric unit of mass. 1 kilogram = 1,000 grams A.M. The time between midnight and noon. P.M. The time between noon and midnight. Elapsed Time The time that passes between the beginning and the end of an event. Vertical Axis Vertical Axis A reference line for a graph that runs up and down. Horizontal Axis A reference line for a graph that runs left to right. Horizontal Axis Vertical Bar Graph Number of Cans A bar graph with vertical bars. Canned Goods at the Market Canned Goods Canned Goods Horizontal Bar Graph A bar graph with horizontal bars. Canned Goods at the Market Number of Cans Pictograph A graph that used pictures or symbols to represent data. Axis Vertical Axis A reference line for a graph. A graph has 2 axes. Horizontal Axis Scale An arrangement of numbers in order with equal intervals. 1 2 3 4 Key A part of a map, graph, or chart that explains what symbols mean. Each stand for 4 votes. Bar Graph Number of Cans A graph that uses bars to show data. The bars may be horizontal or vertical. Canned Goods at the Market Canned Goods Frequency Table A table that shows how many times each event, item or category occurs. Player Goals Steve 5 Jill 9 Line Plot A diagram that shows frequency of data on a number line. 1 2 3 4