What are we learning today?  Objective: Identify and interpret the 4 types of graphs and how they are used to show results.  Essential Question: How do scientists communicate?

Have you ever heard the saying… “A picture is worth a thousand words!”

Getting Started A Picture is worth a thousand words activity 1.Listen to Ms. Clark’s instructions completely before doing anything. 2.Choose who will be partner A, who will be partner B 3.Round 1: Partner B faces away from the screen, Partner A faces the screen. 4.An image will appear. Partner B has SNB open, ready to draw what partner A describes on the right side of the SNB as accurately as she/he can. 5.Rules: No peeking Partner B! A picture is worth a thousand words Partner A, so you can’t speak more than that. 6.Round 2: Partners switch roles.. New picture. Repeat.

READY??

Picture Reflection. In your Notes please respond to the following: 1.What was your experience like giving directions to someone? 2.What was your experience like receiving direction from someone? 3.How might this activity demonstrate why scientists use charts and graphs?

Why Do We Use Charts and Graphs?  We use charts and graphs to help us communicate our results and conclusions  Sometimes, complicated information can be made easier to understand by providing an illustration  Graphs make it easier to draw conclusions from data.

There are 4 Main Types of Graphs  1) Scatter Plots  2) Bar graphs  3) Line graphs  4) Pie charts

What is a scatter plot?  A type of graph that uses plotted points that show the relationship between two sets of data.

Ice Cream Data in Scatter Plot You can also draw a "Line of Best Fit" (also called a "Trend Line") on your scatter plot. Try to have the line as close as possible to all points, and as many points above the line as below. Trend lines are used to show correlation.

Correlation? Correlation is Positive when the values increase together, and Correlation is Negative when one value decreases as the other increases. The relationship below is POSITIVE because the line slopes UP.

Correlation? Correlation is Positive when the values increase together, and Correlation is Negative when one value decreases as the other increases. It has a negative correlation (the line slopes down)

What is a bar graph?  Usually a bar graph is used to compare different groups or to show change over longer periods of time  However, when trying to measure change over time, bar graphs are best when the changes are larger.

Example: Popular Degrees to Get in College

What is a line graph?  A line graph is usually used to show how something changes over a shorter period of time  When smaller changes exist, line graphs are better to use than bar graphs.  Line graphs can also be used to compare changes over the same period of time for more than one group.

Example: Temperatures in Clinton, AR This Week

What is a pie chart?  Pie charts are used to show percentages of a whole at a set point in time  Example: Favorite Musicians of 8 th Graders

Conclusion?  Example - Facebook survey: Favorite Little Debbie snack foods. What are the top 3?

Four main parts of a graph Title-goes across the top. Tells you what the graph is about. Axes labels or legend- gives you information on what they represent and how they are measured. X-axis: the horizontal one (side-to-side). Always has the independent variable. Y-axis: the vertical one (up and down). Always has the dependent variable.

How do you label the axes?  Varying the amount of fertilizer to see how tall a plant grows.  Seeing how different types of music impact how you do on the weekly quizzes for Biology  Seeing if different amounts of studying help you on your math tests

SCALING  When you are deciding what value to make each division along an axis, you need to take the largest value you have for each axes and then divide that value by the number of divisions you have on that axes.  5 divisions with the largest being /5 = 100

Rounding  You will then round up to the nearest value that makes sense for the graphs (nearest whole number, nearest multiple of 5, 10, 100, ect).  10 divisions with 95 as a maximum 95/10= 9.5 so round to 10

Practice  Maximum 60 and 6 lines  Maximum 450 and 10 lines  Maximum 300 and 30 lines

Exit Ticket  For the following experiment, figure out the IV and DV and then draw your graph, label your axes, and write what type of graph you would make Marquesha wanted to test the amount of mold on her bread based on how many days it was left out of the bag.