UNIT 1 SCIENCE AND TECHNOLOGY

LESSON 3 GRAPHS IN SCIENCE

Essential Questions:

What kinds of data do data tables, line graphs and bar graphs display?

Why are data tables, line graphs and bar graphs powerful tools?

An arrangement of information Data table in labeled rows and columns.

Data tables help you record observations and interpret information.They are an orderly way to record information.

Create Data Tables

Suppose that your class decides to sponsor a Scrabble® competition to raise money. You’ll ask people to pay $1.00 each to play. The money will go to a charity that your class has chosen. To keep track of the results, all players will have official score cards that show the five scrabble games they play. They will keep track of their wins and losses. The easiest way to show all that information would be in a data table.Title?Column heading/s?Row heading/s?Units?

A graph that is a good choice Bar graphto use when the manipulatedvariable is not a numberand the data is not continuous

Bar graphs must include:

A title A labeled horizontal axis with qualitative groupsA labeled vertical axis with a scale Shaded bars

Title

Labeled vertical axis with a scale Labeled horizontal

axis with groups

Shaded bars

1. What is the manipulated variable and responding variable in the graphs?

2. In bar graph A, which school has the largest number of students?

3. In bar graph B, why are the bar graphs shaded different colors?

A graph that displays Line graphdata that shows how onevariable (responding) changesin response to another variable (manipulated)

Line graphs allow you to identify patterns and make predictions

Labeled vertical axis (responding)

A scale

Labeled horizontal axis (manipulated)

Line graphs must include:

A title A labeled horizontal axis (manipulated variable) A labeled vertical axis (responding variable) A scale Data points

Data points

Title

A line graph in which Linear graphthe data points forma straight line

A line graph in which Nonlinear graphthe data points do notfall along a straightline

Is the graph linear or nonlinear?