1. Measurement & graphs in Science
Chapter 1.2 and 1.3

2. Metric System: system of measurement based on the number 10
SI: System International, allows scientists to compare data and communicate with each other about their results

3. LENGTH Length: measured in meters Length Conversions 1 km 1000 m 1 m
100 cm 1m
1000 mm
1 cm
10 mm

4. MASS Mass: the amount of matter an object contains
Measured with kilograms
1 kg = 1000 grams

5. Weight Weight: measure of the force of gravity acting on an object
Easy way to think about it
Weight = Mass + Gravity

6. volume Volume: amount of space an object takes up
Measured in mililiters
1000 mL = 1 Liter

7. Density Combination of 2 measurements –Mass and Volume
Measured in g/mL or g/cm3
Density = Mass ÷ Volume

8. Time
Measured in seconds
60 s = 1 min.

9. temperature Often measured in Celsius
SI unit for Temperature is Kelvin
0°C = 273 K
32° F = 0°C
100°C = 373 K

10. GRAPHS IN SCIENCE

11. Graph = picture of data
Line graphs show how one variable changes in response to another variable

12. What do you need to make a line graph?
1 – Axes :
Horizontal (x-axis), runs left and right
Vertical (y-axis), runs up and down
2 – Labels:
x-axis is labeled with the manipulated variable
Y-axis is labeled with the responding variable

13. 3- Create a Scale:
Each axis has a scale of numbers ranging from the smallest to largest with equal space in between
Origin: point where the x and y axis meet (0,0)

14. 4- Plot the data:
Draw a dot where the x and y values intersect
5-Line of Best Fit: Smooth line that reflects the overall trend of the graph
6-Add a title that identifies the variables or relationship shown in the graph

15. Trends Linear: data points make a straight line
Nonlinear: data points may create a curved line
No Trend: data points are scattered and make no recognizable pattern

16. POSITIVE VS. NEGATIVE TRENDS
Positive: x-value increases as y-value increases
Negative: x-value increases as y-value decreases
Positive Or
Negative
POSITIVE

18. Name that trend
Nonlinear

19. Name that trend
Linear

20. Name that trend No
Trend