1. Data Tables & Graphing

2. What is a data table?
A data table is an organized arrangement of information in labeled rows & columns.
Column 1
Column 2
Row 1
Row 2

3. Why do we use data tables?
In science, we use them to record observations.
They help us interpret information collected in an experiment.

4. Parts of a Data Table
Title: number, underlined, describes what the data is about.
Table #1 Effects of Fertilizer on Plant Growth
Box: rows & columns
Headings: above columns or to the left of rows; describes data

5. Data Table Practice # 1 Use a RULER!!!
For two minutes open and close your right hand as fast as you can. Have a partner record the amount of closures every 30 seconds until the 2 minutes are up. Repeat for your left hand. (Before you begin, set up your table)

6. Table #1 Hand Closures Over Time
Number of Hand Closures 30 60 90
120

7. Data Table Practice #2
Record the hair colors by sex of your classmates using black, brown, blonde and red as headings.

8. Table #2 Hair Color by Sex
Number of Students
Male
Female
Black
Brown
Blonde
Red

9. Data Table Practice #3
Record the amount of kids wearing tennis shoes, sandals, & boots in your class.

10. Table #3 Student Shoe Types in Ms. McNease’s Class
Number of Students Wearing
Tennis shoes
Sandals
Boots

11. What is a graph?
A graph is a pictorial representation of the relationship between two quantities.
Independent variable (manipulated)
Controlled by experimentor
Dependent variable (responding)
Something we observe as the result of the experiment

12. Graph Types
Bar graphs
Line graphs
Circle Graphs

13. Bar Graphs
A bar graph is a diagram in which data about separate but related items are compared.
Place the categories on the horizontal axis.
Place the measurements on the vertical axis.

14. Line Graphs Remember “DRY MIX”
Dependent or Responding variable is plotted on the Y-axis.
Manipulated or Independent variable is plotted on the X-axis.

15. Circle Graphs
A circle graph shows data as parts of a whole.

16. Graphing Rules Use GRAPH PAPER!!!!!
Title: number (Graph #1), underlined, describes what data is about.
Draw x-axis horizontally, and y-axis vertically.
Label the x-axis with the independent variable heading and the y-axis with the dependent variable heading.

17. Graphing Practice
Identify the variables as independent & dependent variables.

18. Examples The world population per year I=year D=population
Temperature & breathing rate in fish
I=temperature
D=breathing rate

19. Examples Height of plants per day I=day D=height
The number of minutes animals can hold their breath
I=type of animal
D=number of minutes

20. Examples The amount of rain in different environments I=environment
D=amount of rain
The amount of body fat in different age groups
I=age group
D=amount of body fat

21. Examples The grade you make vs. the minutes you study
I=minutes you study
D=grade you make
Heart rate & breathing rate at various temperatures
I=temperature
D=heart rate & breathing rate

22. The End