2What is a data table?A data table is an organized arrangement of information in labeled rows & columns.Column 1Column 2Row 1Row 2
3Why do we use data tables? In science, we use them to record observations.They help us interpret information collected in an experiment.
4Parts of a Data TableTitle: number, underlined, describes what the data is about.Table #1 Effects of Fertilizer on Plant GrowthBox: rows & columnsHeadings: above columns or to the left of rows; describes data
5Data 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)
6Table #1 Hand Closures Over Time Number of Hand Closures306090120
7Data Table Practice #2Record the hair colors by sex of your classmates using black, brown, blonde and red as headings.
8Table #2 Hair Color by Sex Number of StudentsMaleFemaleBlackBrownBlondeRed
9Data Table Practice #3Record the amount of kids wearing tennis shoes, sandals, & boots in your class.
10Table #3 Student Shoe Types in Ms. McNease’s Class Number of Students WearingTennis shoesSandalsBoots
11What is a graph?A graph is a pictorial representation of the relationship between two quantities.Independent variable (manipulated)Controlled by experimentorDependent variable (responding)Something we observe as the result of the experiment
13Bar GraphsA 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.
14Line Graphs Remember “DRY MIX” Dependent or Responding variable is plotted on the Y-axis.Manipulated or Independent variable is plotted on the X-axis.
15Circle GraphsA circle graph shows data as parts of a whole.
16Graphing 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.
17Graphing PracticeIdentify the variables as independent & dependent variables.
18Examples The world population per year I=year D=population Temperature & breathing rate in fishI=temperatureD=breathing rate
19Examples Height of plants per day I=day D=height The number of minutes animals can hold their breathI=type of animalD=number of minutes
20Examples The amount of rain in different environments I=environment D=amount of rainThe amount of body fat in different age groupsI=age groupD=amount of body fat
21Examples The grade you make vs. the minutes you study I=minutes you studyD=grade you makeHeart rate & breathing rate at various temperaturesI=temperatureD=heart rate & breathing rate