g4c4

=Grade 4 Math, Chapter 4=


 * Vocabulary

__analog clock__**: Shows time by pointing to numbers on a face.

__**second**__: A unit of time, 60 seconds equal 1 minute.

__**digital clock**__: Shows time with numbers. Hours are separated from minutes with a colon.

__**minute**__: A unit of time equal to 60 seconds

__**A.M.**__:Time between midnight and noon.

__**hour:**__ Unit of time equal to 60 minutes

__**P.M.**__: Time between noon and midnight

__**century**__: Unit of time equal to 100 years.

__**millennium**__: A unit of measuring time to 1,000 years.

day: A unit of time equal to 24 hours.

week: A unit of time equal to 7 days.

month: One of the 12 parts into which a year is divided.

Leap year: Unit of time equal to 366 days.

decade: Unit of time equal to 10 years.

elapsed time: The amount of time between the beginning of an event and the end of the event.

ordinal numbers: Numbers used to tell order.

data: Pieces of collected information

pictograph: A graph using pictures or symbols to show data.

key:A part of a pictograph that tells what each symbol stands for.

line plot:A display of data along a number line.

outlier: A number in a data set that is very different from the rest of the numbers.

bar graph: A graph using bars to show data.

scale: Numbers that show the units used on a graph.

interval: A number which is the difference between two consecutive numbers on the scale of a graph.

coordinate grid: A grid used to show ordered pairs.

ordered pair: A pair of numbers that names point on a coordinate grid.

plot: To locate and mark a point named by an ordered pair on a grid.

line graph: A graph that connects points to show change over time.

increase: When the line goes up from left to right in a line graph.

decrease:When the line goes down from left to right in a line graph.

trend: A pattern in the data on a line graph, shown by an increase or decrease. median: The middle number in an ordered set of data.

mode: The number or numbers that occur most often in a data set.

range: The difference between the greatest value and the least value in a data set.

survey: Collecting information by asking a number of people the same question and recording their answers.