1. Representing Data
Unit 1 Lesson 3

2. How do scientists make sense of data?
Make Tables to Organize data
Create graphs to analyze data

3. Tables Tables are used to organize and record data
Data may be measurements or observations
Tables are organized into rows and columns
Units of measurement in column headings

4. Graphs Graphs show relationships in data
Circle graph – shows parts of a whole
Bar graph – used to display and compare data
Line graph – shows continuous change

5. Models
Models are visual or mathematical representations of an object or system
Models show things too small, large, complex or dangerous
Models cannot always show everything they represent

6. Precision and Accuracy
Scientists must be very careful when taking measurements
Data is measured against a STANDARD
Precision tells how reliable the results are when repeated
Accuracy refers to how closely data agrees with the standard