1. Essential Question
*How are scientific graphs used to understand data?
Scientific Graphs

2. 1. Bar graph - used for comparing data between different groups or categories
Type of Trash
Number of pieces
Cigarettes
14,000
Styrofoam
6,100
Plastic
5,220
Paper
4,963
Wood
1,091
Metal
982
Glass
511
Cloth
503
Rubber
210
Other
644

3. 2. Pie graph - used for comparing percentages of a set of data
U.S. Electricity generation by source
Percentage %
Coal
44.9
Natural gas
23.4
Nuclear
20.3
Hydroelectric
6.9
Petroleum
1.0
Other renewables
3.6

4. Bell Ringer

5. 3. Line Graph – shows movement of data over time, distance, or other measurements.25 20 15 10 5
Number of Pendulum Swings
Number of Pendulum Swings
(RATE) • • •
Length of Pendulum
Trial 1
Trial 2
Trial 3
Average
30 cm 23 22
22.7 (23)
40 cm 21
21.3 (21)
50 cm 19
Length of Pendulum (in cm)

6. **shows how the dependent variable responds to the independent variable.25 20 15 10 5
Number of Pendulum Swings
Number of Pendulum Swings
(RATE) • • •
Length of Pendulum
Trial 1
Trial 2
Trial 3
Average
30 cm 23 22
22.7 (23)
40 cm 21
21.3 (21)
50 cm 19
Length of Pendulum (in cm)

7. *Line graphs allow scientists to identify trends and make predictions
Number of Pendulum Swings
Number of Pendulum Swings
(RATE) 20 15 10 5
Mass of
Pendulum
Trial 1
Trial 2
Trial 3
Average
14.2 g 19 18
(19)
28.7 g
42.8 g
• • •
Mass of Pendulum (in grams)

8. *Line graphs allow scientists to identify trends and make predictions

9. **When making a graph, numerical values must be in even increments
RIGHT WRONG
Number of Pendulum Swings 20 12 10 8 5 4 3 2 20 15 10 5
Length of Pendulum (in cm)

10. **When making a graph, numerical values must be in even increments