Name: Date: Class: Lesson 3: Graphing. a. Useful for. AMOUNT OF HEAT PRODUCED IN KJ. b. Difference between a line graph and a scatter plot:

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1 AMOUNT OF HEAT PRODUCED IN KJ NOTES Name: Date: Class: Lesson 3: Graphing Types of Graphs 1. Bar Graph a. Useful for. b. Helps us see quickly. Heat Produced Upon Mixture of Different Acids into Water sulfuric acid nitric acid hydrochloric acid carbonic acid TYPE OF ACID 2. Line Graph / Scatter Plot a. Shows how much. b. Difference between a line graph and a scatter plot: i. In a line graph, a line is drawn ii. In a scatter plot, points are not connected, but a is drawn c. May be able to discern a clear in the data and 1

2 Line Graph Scatter Plot 3. Pie Chart Used to show ; can show the of something.. 2

3 4. Histograms a. Shows of variables. b. The of each bar is proportional to the frequency of a variable. c. of bars are both important. i. For bar graphs just the is important because you re comparing variables. 3

4 Parts of a Graph: When you re making your own graphs, make sure they include the following features. : Summarizes information being represented in the graph. : The variable that is controlled by the experimenter, such as, time, dates, depth, and temperature. This is placed on the. : The variable that is. It is the result of what happens as time, dates, depth and temperature are changed. This is placed on the. : In constructing a graph, one needs to know where to plot the points representing the data. In order to do this a scale must be employed to include all the data points. Axis labels with units. 4

5 GRAPH INTERPRETATION PRACTICE: 1. Write a detailed caption for each graph to describe the relationship between the variables. 2. First, use a ruler to draw a line of best fit for each graph. Then, write a detailed caption for each graph to describe the relationship between the variables 5

6 Answer the following questions about the graph below. a. What is the independent variable of the experiment performed to obtain this data? b. What is the dependent variable of the experiment performed to obtain this data? c. According to the graph, what is the % alcohol content when density is 0.94 g/ml? 6

7 GRAPHING PRACTICE: Graph the following information in a LINE graph. Label and number the x and y-axis appropriately. # of Days # of Bacteria What is the independent variable? 2. What is the dependent variable? 3. What is an appropriate title? 7

8 Graph the following information in a LINE graph. Label and number the x and y-axis appropriately. Temperature Enzyme Activity What is the independent variable? 2. What is the dependent variable? 3. What is an appropriate title? 8

9 ACTIVITY: In groups of 3-4, obtain one dye. Roll the die at least 50 times, recording the number you see each time in a frequency chart. On a piece of graphing paper, draw a histogram graph showing the frequency of each number you saw during the rolls. Experiment: Tally each time you see the number: Analysis: Graph the data: Y axis: Frequency of Number X axis: Numbers 1-6 Discussion: 1. Did you see any patterns in the dye rolls? 2. Did any number(s) appear more frequently? 3. Did any number(s) appear less frequently? 4. Compare your graph to others in the class and discuss. 9

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