Graphing Notes NCVPS Module 1 Introduction to Science.

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Presentation transcript:

Graphing Notes NCVPS Module 1 Introduction to Science

Organizing Data Observing events and making measurements enable scientists to accumulate vast amounts of data. Data must be organized to enable the scientists to interpret it. Data tables and graphs are used to organize scientists’ data. Data tables and graphs make it easy to spot patterns or trends in data that can support or disprove a hypothesis. Simplest form of organizing data is using a table. Sample Data table: Average Annual Precipitation for Selected Cities City Average Annual Precipitation (mm) Buffalo, NY980 Houston, TX1170 San Diego, CA251 Tallahassee, FL1669

Scenario Students are asked for their favorite cartoon character during attendance. Data will be recorded on the board. Sample data: Mickey Mouse 3 Bugs Bunny 5 Alvin 8 Buzz Lightyear 9 How can we represent this data in a graph? Which graph would be appropriate? Scientists organize their data by using data tables and graphs.

Types of Graphs LINE GRAPHS: Useful for showing the relationship between two variables. What is the slope? Slope is the steepness of the line. The formula for slope: Slope= Rise/ Run Important to note the steepness of the slope. The steeper the slope the greater the vertical change with respect to the horizontal. Direct proportion is a relationship in which the ratio of two variables is constant. Inverse proportion is a relationship in which the product of two variables is a constant. Inverse proportion EXT_RESOURCE/U03_L2_T3_text_container.html Direct Proportion

Types of Graphs Bar Graph: Used to compare a set of measurements, amounts, or changes. Circle Graph: A divided circle that shows how a part or share of something relates to the whole. Good way to show how a part of something relates to the whole.

Sample Graphs Bar Graph Using the Data from the scenario discussed.

Sample Graphs Line Graph Plot the high temperatures for five days.

Sample Graphs Pie Graph Graph the percent of ethnic groups within a class room. Percent of Students Ethnicity Percent of Students African Afmerican35 Cacucasian40 Asian10 Indian8 Other7