Teacher Page• I. Scientific Inquiry A. Processes of Scientific Inquiry.• State standards 1.6• 7th grade assessment.• Students should be able to organize information into

graphs.• View lesson before using with students. • Mouse clicks are used to advance slides and add

information to each slide.

Make Graphs to Organize Data

•When you do an experiment in science, you collect information.

•To find out what your information means, you can organize it into graphs

•There are many kinds of graphs

•Circle Graph

•Bar Graph

•Line Graph

Circle Graphs• A circle graph is helpful

to show how a complete set of data is divided into parts.

• The circle graph here show how water is use in the United States.

• What is the single largest use of water?

• Electric Power plants.

Water UseElectricpowerplantsHomes

Industry

Irrigation

49%33%

10%

8%

Bar GraphsMagnet Strength

0

2

4

6

8

10

12

20 30 40 50 60

Coils of Wire

Pap

er C

lips

• A bar graph uses bars to show information.

• For example, what if you wrap wire around a nail and connect the ends to a battery?

• The nail becomes a magnet that can pick up paper clips.

Bar GraphsMagnet Strength

0

2

4

6

8

10

12

20 30 40 50 60

Coils of Wire

Pap

er C

lips

• What does the graph show?

• The more you wrap the wire around the nail, the more paper clips it picks up.

• How many paper clips did the nail with 20 coils pick up?

• 3 paper clips• With 50 coils?• 9 paper clips

Line Graphs• A line graph shows

information by connecting dots plotted on the graph.

• For example, you measure how high a plant has grown each week for 8 weeks.

• The line graph below organizes the measurements.

Plant Growth

0

5

1015

20

25

30

2 3 4 5 6 7 8

Weeks

Hei

ght

(cm

)

Line GraphsPlant Growth

0

5

10

15

20

25

2 3 4 5 6 7 8

Weeks

Hei

ght

(cm

)

• Between which two weeks did the plant grow most?

• Weeks 5 and 6.• When did plant

growth begin to level off?

• Week 7.

Make a Graph•What if you collect information about how much water your family uses each day?

•Decide what type of graph would best organize such data.

•Collect the information, and make your graph.

•Compare it with those of classmates.

Activity Water Used (L)

Drinking 10Showering 180Bathing 240Brushing teeth 80Washing dishes 140Washing hands 30Washing clothes 280Flushing toilet 90