Bell Ringer  Answer the following questions in your notebook: 1. What is your favorite ice cream flavor? a. chocolate b. strawberry c. vanilla 2. What is your favorite animal? a. dog b. cat c. hamster d. fish e. bird 3. What is your favorite time of day? a. morning b. afternoon c. night

Bell Ringer 1. Which of the following is an SI unit? A. foot B. pound C. second D. yard 2. A ______ is an exact quantity that people agree to use to compare measurements. A. variable B. standard C. unit D. control

1-3 Communicating with Graphs

A. What is a graph?  A graph is a visual display of information or data that is used to detect patterns.  Is this a graph?

B. How are graphs useful?  Scientists often graph their data to detect patterns that would not have been evident in a table.  Can you think of any other ways graphs might be useful?

C. Three common types of graphs:  line graphs  bar graphs  circle graphs

1. Line Graphs  A line graph shows a relationship where the dependent variable changes due to a change in the independent variable.  The x-axis should always be used for the independent variable.

1. Line Graphs

2. Bar Graphs  Bar graphs compare information collected by counting.  Each bar represents a quantity counted at a particular time.

2. Bar Graphs

3. Circle Graphs  Circle graphs show how a whole is broken into parts.  The circular pie represents the total.  The slices represent the parts and are usually shown as percentages.

3. Circle Graphs

Directions for Constructing Line Graphs: 1. Turn your paper long ways (landscape) and use the whole sheet for your graph. 2. Draw your x and y axes. Label both axes and be sure not to forget your units! 3. Choose a good title for your graph. 4. Find the highest numbers on your data to decide how high your scales need to go. 5. Plot all your points and be sure not to forget your key. Each different line should be a different color and the colors on your key must match. 6. Don’t forget to put your name on your graph. 7. When you are finished, you need to show your graph to someone sitting near you to see if they can find anything missing from your graph. Be sure to correct any mistakes that are found.

Line Graph Data: Average Height of Growing Plants Time (days)Plant 1 Height (mm)Plant 2 Height (mm)

Directions for Conducting Surveys: 1. Number your paper to twenty (this is how many different students you are going to survey) 2. Write the question you are going to ask your classmates at the top of your paper above number one. 3. Choose somewhere between three to five answer choices for your survey. 4. Once you are finished, return to your seat tally up your totals for each answer choice.

Directions for Constructing Bar Graphs: 1. Tally up how many responses you had for each answer choice on your survey 2. Next, figure out what your highest number of responses was. This is how high your numbers should go on your y (vertical) axis. 3. Be sure you use colored pencils to shade each bar a different color.