Ps1 chapter 1
- 1. Chapter 1
- 2. Physical science • Science – gathering knowledge about the natural world • Physical science – study of matter and energy (matter – “stuff” everything is made of / energy – ability to do work) • Chemistry – study of all forms of matter • Physics – study of the way energy affects matter
- 3. • Science is all around you: meteorology, geology, biology • Scientific method – 6 steps used to answer questions and solve problems • 1. ask a question – be specific (only 1 ?) • 2. form hypothesis – make educated guess • Test hypothesis – do the experiment
- 4. • Scientific method – 6 steps used to answer questions and solve problems – 1. ask a question – be specific (only 1 ?) – 2. form hypothesis – make educated guess – Test hypothesis – do the experiment (control, dependent variable, independent variable)
- 5. • Control – nothing changes, used for comparison • Dependent variable – what is being changed • Independent variable – what is used to make the change
- 6. • 4. analyze results – does the results prove or disprove your hypothesis • 5. draw conclusion – sum up the results • 6. communicate the results – write paper, make presentation, create website
- 7. • Models – represent object or system • 3 types: – Physical – a three dimensional representation of an object (a globe), doesn’t act or interact like the real thing – Mathematical – equations or data (E=mc2) – Conceptual – system of ideas (big bang theory)
- 8. Law’s and Theories • Law- summary of many experimental results and observations – tells how things work…not why it works • Theory – an explanation for many hypothesis and observations