A.M. The time between 12:00 midnight and 12:00 noon. Houghton Mifflin Co. 1 Grade 4 Unit 5

A.M. The time between 12:00 midnight and 12:00 noon. Houghton Mifflin Co. 1 Grade 4 Unit 5

bar graph A graph in which information is shown by means of rectangular bars. Favorite Sea Creature Sea Creature Whale Dolphin Seal 0 5 10 15 20 25 30 35 40 Number of Students Houghton Mifflin Co. 11 Grade 4 Unit 5

capacity The amount a container can hold. Houghton Mifflin Co. 14 Grade 4 Unit 5

centimeter (cm) A metric unit of length. 100 centimeters 1 meter Houghton Mifflin Co. 16 Grade 4 Unit 5

century A unit of time. 1 century 100 years Houghton Mifflin Co. 17 Grade 4 Unit 5

circle graph A graph that represents data as part of a circle. Houghton Mifflin Co. 20 Grade 4 Unit 5

cups (c) Customary units of capacity 2 cups 1 pint Houghton Mifflin Co. 34 Grade 4 Unit 5

data A set of information. Houghton Mifflin Co. 35 Grade 4 Unit 5

decade A unit of time. 1 decade 10 years Houghton Mifflin Co. 36 Grade 4 Unit 5

decimeter (dm) A metric unit of length. 1 decimeter 10 centimeters Houghton Mifflin Co. 40 Grade 4 Unit 5

degrees Celsius ( C) The metric temperature scale. Houghton Mifflin Co. 42 Grade 4 Unit 5

degrees Fahrenheit ( F) The customary temperature scale. Houghton Mifflin Co. 43 Grade 4 Unit 5

double bar graph A graph in which data is compared by means of pairs of rectangular bars drawn next to each other. Number 50 45 40 35 30 25 20 15 10 5 0 Drinks Sold Mon. Tues. Wed. Thurs. Fri. milk orange juice Day Houghton Mifflin Co. 49 Grade 4 Unit 5

eighth inch A customary unit of length. An eighth inch is 1 8 the length of an inch. Houghton Mifflin Co. 52 Grade 4 Unit 5

elapsed time The time that passes between the beginning and the end of an activity. Houghton Mifflin Co. 53 Grade 4 Unit 5

foot (ft) A customary unit of length. 1 foot 12 inches Houghton Mifflin Co. 68 Grade 4 Unit 5

gallons (gal) Customary units of capacity. 1 gallon 4 quarts Houghton Mifflin Co. 72 Grade 4 Unit 5

gram (g) A metric unit of mass. 1 gram 1,000 milligrams Houghton Mifflin Co. 73 Grade 4 Unit 5

half inch A customary unit of length. A half inch is half the length of an inch. Houghton Mifflin Co. 75 Grade 4 Unit 5

inch (in.) A customary unit of length. 12 inches 1 foot Houghton Mifflin Co. 80 Grade 4 Unit 5

interval The difference between two numbers on a scale. Houghton Mifflin Co. 84 Grade 4 Unit 5

key A part of a map, graph, or chart that explains what the symbols mean. Houghton Mifflin Co. 88 Grade 4 Unit 5

kilogram (kg) A metric unit of mass. 1 kilogram 1,000 grams Houghton Mifflin Co. 89 Grade 4 Unit 5

kilometer (km) A metric unit of length. 1 kilometer 1,000 meters Houghton Mifflin Co. 90 Grade 4 Unit 5

line graph A graph that uses a line to show changes in data over time. 6 Kudzu Vine Growth length ( in feet) 5 4 3 2 1 0 Mon. Tues. Wed. Thurs. Fri. Day Houghton Mifflin Co. 93 Grade 4 Unit 5

line plot A diagram that organizes data using a number line. X X X X X X X X X X X X 0 5 10 15 20 25 Houghton Mifflin Co. 95 Grade 4 Unit 5

liter (L) A metric unit of capacity. 1 liter 1,000 milliliters Houghton Mifflin Co. 98 Grade 4 Unit 5

mean The number found by dividing the sum of a group of numbers by the number of addends. Also called average. Example: 6 2 1 9 9 3 addends 3 The mean of 6, 2, and 1 is 3. Houghton Mifflin Co. 99 Grade 4 Unit 5

median The middle number when a set of numbers is arranged in order from least to greatest. For an even number of numbers, the median is the average of the two middle numbers. Example: The median of 2, 5, 7, 9, and 10 is 7. The median of 2, 5, 7, and 12 is (5 7) 2, or 6. Houghton Mifflin Co. 100 Grade 4 Unit 5

meter (m) A metric unit of length. 1 meter 100 centimeters Houghton Mifflin Co. 101 Grade 4 Unit 5

mile (mi) A customary unit of length. 1 mile 5,280 feet Houghton Mifflin Co. 102 Grade 4 Unit 5

milliliter (ml) A metric unit of capacity. 1,000 milliliters 1 liter Houghton Mifflin Co. 103 Grade 4 Unit 5

millimeter (mm) A metric unit of length. 10 millimeters 1 centimeter Houghton Mifflin Co. 104 Grade 4 Unit 5

mode The number or numbers that occur most often in a set of data. Example: The mode of 2, 3, 4, 4, 6 is 4. Houghton Mifflin Co. 107 Grade 4 Unit 5

negative numbers Numbers that are less than 0. Examples: 2, 5, and 9 Negative numbers are less than 0. 9 5 2 0 Houghton Mifflin Co. 110 Grade 4 Unit 5

ounces (oz) Customary units of weight. 16 ounces 1 pound Houghton Mifflin Co. 121 Grade 4 Unit 5

outlier A number or numbers that are at one or the other end of a set of data, arranged in order, where there is a gap between the end numbers and the rest of the data. Example: In the data set 5, 6, 8, 25, the outlier is 25. Houghton Mifflin Co. 123 Grade 4 Unit 5

P.M. The time between 12:00 noon and 12:00 midnight. Houghton Mifflin Co. 124 Grade 4 Unit 5

pictograph A graph in which information is shown by means of pictures or symbols. Year 1 Book Sale Year 2 Year 3 Year 4 Each stands for 5 books sold. Houghton Mifflin Co. 133 Grade 4 Unit 5

pint (pt) A customary unit of capacity. 1 pint 2 cups Houghton Mifflin Co. 134 Grade 4 Unit 5

positive numbers Numbers that are greater than zero. Examples: 2, 5, and 9 Positive numbers are greater than 0. 0 2 5 9 Houghton Mifflin Co. 139 Grade 4 Unit 5

pounds (lb) Customary units of weight. 1 pound 16 ounces Houghton Mifflin Co. 140 Grade 4 Unit 5

quarter inch A customary unit of length. A quarter inch is 1 4 the length of an inch. Houghton Mifflin Co. 149 Grade 4 Unit 5

quarts (qt) Customary units of capacity. 1 quart 2 pints Houghton Mifflin Co. 150 Grade 4 Unit 5

range The difference between the greatest and least numbers in a set of data. Example: The range of 2, 3, 6, 8, 9 is 7 because 9 2 7. Houghton Mifflin Co. 153 Grade 4 Unit 5

stem-and-leaf plot A table that organizes information by place value. Each stem is the tens digit of each number Minutes Spent Doing Chores Stem Leaves 3 4 0 5 5 8 0 5 Each leaf is the one digit of each number 5 0 5 6 7 7 3 0 = 30 Minutes Houghton Mifflin Co. 177 Grade 4 Unit 5

survey A way to collect data in which you ask people a question and record their answers. Houghton Mifflin Co. 179 Grade 4 Unit 5

tons (T) Customary units of weight. 1 ton 2,000 pounds Houghton Mifflin Co. 182 Grade 4 Unit 5

yard (yd) A customary unit of length. 1 yard 3 feet Houghton Mifflin Co. 197 Grade 4 Unit 5