Introduction to waves Monday, March 21, 2016

Unit 11: Waves Monday, 3/21 Pick up a warm-up sheet and the Spring fever article and do the following:  Read the article (do not write on it)  Commit to three things you will do to combat ‘spring fever’ and finish the year strong with pride. Write your commitments on your warm-up Upcoming dates:  Friday, 4/1 – waves quiz.  Monday, 4/11 – waves quiz  Wednesday, 4/13 – Waves test and all missing waves work is due (missing work is a zero after you test)  Tuesday, 4/19 – EM Spectrum/Optics quiz  Wednesday, 4/27 - EM Spectrum/Optics quiz  Friday, 4/29 – EM Spectrum/Optics test all missing EM Spectrum/Optics work is due (missing work is a zero after you test)  Monday, 5/9 – Atomic Physics test all missing Atomic physics work is due (missing work is a zero after you test)  Tuesday, 5/17 – Rube Goldberg Project due (test grade)  Monday, 5/23 – Bottle Rocket launch day  Tuesday, 5/31 – Exam review due (it is 30% of your exam grade)

Where we’ve been  We have explored different types of energy transfer.  Discuss with your partner the different types of energy transfer we have studied during the school year.

Energy Transfer  Conservation of momentum  Mechanical energy transfer  Thermal energy transfer  Electrical potential energy transfer

Where we are going  Investigate the energy transferred by mechanical waves.

Unit Overview Waves Mechanical Waves Electromagnetic (EM) Waves Transverse Longitudinal Ocean wave Sound wave Light wave

Tsunami  As you watch the video think about the following:  What causes the Tsunami?  What role does energy play if any?  What relevance does the velocity of the wave have on the destruction?  What happens to the water after the Tsunami strikes? Tsunami Video

Let’s break it down

Generic reason: a pulse (single disturbance)

Large magnitude (speed) and direction results in a large force (F = ma) and a transfer from PE to KE.

Mechanical waves transport energy through a medium. The wave is the energy and the water is the medium through Which it is transported.

EQ: What causes wave motion?  Read through your CNs  Highlight, underline, or circle the words associated with how a wave is created and what a wave is.  Highlight, underline, or circle the words that describe the purpose of a medium and how it functions.

EQ: What causes wave motion?  Answer your EQ in the summary section (should not be more than three sentences)

EQ: What are the characteristics of the different types of waves that occur in nature?  Read through your CNs  Highlight or underline the words that are similar between a electromagnetic and mechanical wave.  Circle the words/concepts that make electromagnetic and mechanical waves different from one another.

Types of Waves  There are two types of waves  Type of wave is dependent on whether it requires a medium.  Mechanical waves require a medium  Electromagnetic waves do not require a medium.

Unit Overview Waves Mechanical Waves Electromagnetic (EM) Waves Transverse Longitudinal Ocean wave Sound wave Light wave Does not require a medium; can travel in a vacuum Requires a medium

EQ: What are the characteristics of the different types of waves that occur in nature?  Answer your EQ in the summary section (should not be more than three sentences)

Periodic Motion

Pendulum Animation

How do particles move in a mechanical wave?  As you watch the animations, pick a particle and follow it as it moves in the simulation. Particle simulation; longitudinal and transverse waves

EQ: What are the characteristics of mechanical waves?  Read through your CNs  Underline the words/phrases that explain how particles move.  Highlight or Circle the following words; transverse, longitudinal, medium, perpendicular, parallel, crest, trough, compression, rarefaction, amplitude.

Unit Overview Waves Mechanical Waves Electromagnetic (EM) Waves Transverse Longitudinal Ocean wave Sound wave Light wave Does not require a medium; can travel in a vacuum Requires a medium Moves Perpendicular Moves paralle l =

EQ: What are the characteristics of mechanical waves?  Answer your EQ in the summary section (should not be more than three sentences)

Common Language  The properties of waveforms are  Wavelength  Amplitude  Frequency  Period  Velocity

What is wave length?

What is amplitude?

What is the frequency of the wave?

What is the period of the wave?

EQ: What do the properties of waveforms allow you to do?  Answer your EQ in the summary section (should not be more than three sentences)

EQ: What do the properties of waveforms allow you to do?  Answer your EQ in the summary section (should not be more than three sentences)

One pager  Put your name (small left had corner) on the blank sheet of paper.  Create a one page summary to use on a open note quiz.  When you are finished, come see me and I will give you a piece of tape to hang your one pager up.  After you hang your paper up wait for further instructions.

Cool Down  What role does a medium play in energy transformation of a mechanical and electromagnetic wave?