1. Integrated Science
Unit 4, Chapter 11

2. Unit Four: Sound and Waves
Chapter 11 Introduction to Harmonic Motion
11.1 Harmonic Motion
11.2 Graphs of Harmonic Motion
11.3 Simple Mechanical Oscillators

3. Chapter 11 Learning Goals
Learn about harmonic motion and how it is fundamental to understanding natural processes.
Use harmonic motion to keep accurate time using a pendulum.
Learn how to interpret and make graphs of harmonic motion.
Construct simple oscillators.
Learn how to adjust the frequency and period of simple oscillators.
Learn to identify simple oscillators.

4. Chapter 11 Vocabulary Terms
amplitude
cycle
frequency
harmonic motion
hertz
oscillator phase
period
periodic motion
system

5. 11.1 Harmonic Motion
Key Question:
How do we describe the back and forth motion of a pendulum?
*Read text section 11.1
AFTER Investigation 11.1

6. 11.1 Harmonic vs. Linear Motion
Harmonic motion repeats over and over again.
Linear motion goes from one place to another without repeating

7. 11.1 Harmonic Motion in:
nature
technology
art and music

8. 11.1 Cycles, systems, and oscillators
A cycle is a unit of motion that repeats.

9. 11.1 Cycles, systems, and oscillator
A system is a group that includes all the things we are interested in studying.
A system that shows harmonic motion is called an oscillator.
ex. pendulum
ex. heart and its muscles

11. 11.1 Amplitude
Amplitude describes the size of a cycle.

12. 11.2 Linear Motion vs. Harmonic Motion Graphs

14. 11.2 Graphs of Harmonic Motion
Key Question:
How do we make graphs of harmonic motion?
*Read text section 11.2 BEFORE Investigation 11.2

15. 11.3 Simple Mechanic Oscillators
pendulums
masses on springs
vibrating strings on musical instruments

16. 11.3 Simple Mechanical Oscillators
Key Question:
What kind of systems oscillate?
*Read text section 11.3
BEFORE Investigation 11.3