Week 2 January 11th

Week 2 January 11th

Objective :

1. Students will be able to show understanding of the similarities and differences between compressional waves and transversal waves with a double bubble map
2. Students will be able to understand that there are eight main types of electromagnetic waves, classified on the electromagnetic spectrum according to their wavelengths, and they will show their understanding by completing the Waves WS #3, along with the given websites and having a classroom discussion with an engineering student.
3. Students will be able to understand how each of the types of electromagnetic radiation is used or found in our everyday lives, and they will show understanding by completing the Wavestown worksheet, along with the given website, and having a classroom discussion with an engineering student.

Agenda:

1. Wavestown worksheet (Homework)/ answer key in folder (put onto tablet)
2. Music ppt slide 1-12 (Mythbusters - Breaking Glass)
3. Goto the computer lab to complete Waves Worksheet #3 (thumbdrive)
4. Cornell Notes on graphing Sine/ Cosine Waves (Show with calculator and use Music ppt. slides 34-41))
5. Waves Worksheet

6. Guest speaker on Friday to have a discussion on the Electromagnetic spectrum
Talk about how they can tell compositions of other planets with spectrum analysis.
7. Use poster of Electromagnetic spectrum

8. Have Michelle Towers come in and give her presentation on cell phones.

Interesting Website:
http://mathdemos.gcsu.edu/mathdemos/trigsounddemo/trigsounddemo.html

http://phet.colorado.edu/simulations/sims.php?sim=Radio_Waves_and_Electromagnetic_Fields

Resources:
http://science.hq.nasa.gov/kids/imagers/teachersite/UL3.htm

http://school.discoveryeducation.com/lessonplans/interact/electromagneticspectrum.html

http://school.discoveryeducation.com/lessonplans/activities/electromagneticspectrum/

http://phet.colorado.edu/simulations/sims.php?sim=Wave_on_a_String

Notes:



TheElectromagnetic Spectrum Tutorial! Procedures
Here are some important facts to know:



1. Compressional waves – such as sound waves - require a medium to transfer energy.
2. Transverse waves – such as light waves - can transfer energy in a vacuum, without a medium.
3. Both types of waves are initiated by something that vibrates, but compressional waves travel slower than transverse waves.

4. The sun’s energy reaches the Earth in transverse waves.
5. The frequency and wavelength of a wave determines how much energy a wave has. 6. Frequency is the number of wave crests that pass a point during one second.

6. Wavelength is the distance between two identical points on two adjacent waves. The shorter the wavelength, the more energy the wave has. But as wavelength increases, frequency decreases.


What do you know about transverse waves and compressional waves. Create a t-chart and compare and contrast the two types of waves. Identify key concepts associated with each wave. Now draw a picture of the sun and the Earth. Describe how energy from the sun reaches the Earth. The energy from the sun is called radiation. Where have you heard the word radiation? What context have you heard that word before. (For example, a radiator gives off heat, or radiation therapy is used to treat cancer.)


Transverse waves that transfer radiation or energy are called electromagnetic waves. These waves are created by electrically charged particles that move. The terms “electromagnetic waves” and “electromagnetic radiation” are used interchangeably because the waves carry the sun’s radiation, which is composed of electrically charged particles. Refer back to the chart created at the beginning of this article and come up with a list of possible characteristics of electromagnetic waves. Because they are transverse waves - and can travel in a vacuum — they can travel through space.
There are different types of electromagnetic radiation existing in the universe. One type of electromagnetic radiation is visible light. The electromagnetic spectrum is something scientists use to classify the different types of electromagnetic radiation. Like the periodic table in Chemistry, where elements are classified according to their structure, electromagnetic radiation is classified according to wavelengths and frequencies. Although there are different types of electromagnetic radiation, they all travel at the same speed - the speed of light or 186,000 miles per second. Humans are only able to see one small portion of the spectrum — visible light.
If you go to this website it will explain more clearly what the Electromagnetic Spectrum is. Electromagnetic Spectrum Tutorial.


Electromagnetic radiation is arranged in the spectrum from the longest wavelength to the shortest. Which waves have the longest and shortest wavelengths. (It may be helpful to draw wavelengths decreasing from left to right above a labeled diagram of the spectrum.) Based on what you have learned about frequency as it relates to wavelength (the longer the wavelength, the lower the frequency), Which waves have the lowest frequency and which have the highest frequency. One easy way for students to remember the relationship between frequency and wavelength is to consider that the longer the wavelength, the lower the frequency, emphasizing the ’l’ at the beginning of each word. And the shorter the wavelength, the higher the frequency, emphasizing the ’h’ in each word. (Again, it may be helpful to reinforce this relationship by labeling lower frequency by the radio waves on the spectrum and higher frequency by the gamma rays.)
Now you will be taking a closer look at the eight types of electromagnetic energy in the spectrum —radio waves, microwaves, infrared waves, visible light, ultraviolet light, x rays, gamma rays, and cosmic waves.

1. What are the characteristics of each type of radiation (wavelength, frequency, key facts)?
2, Where is this type of radiation located on the electromagnetic spectrum in relation to other kinds of radiation?

3. What properties of the wave define why it is found within this area of the spectrum?
4. How is it used or found in our everyday lives or in certain industries? Identify and explain at least two uses.



Note: This might be done as a class by dividing them up into 8 groups, having each group research their part of the spectrum. Remember each group must have the necessary information and materials to make a class presentation on their area of the spectrum. Be creative in your presentations. You will have a variety of materials for your presentations including construction paper, chart paper, markers, overheads, chalk board, colored chalk, and magazines. The key to a successful and interesting presentation is to use visuals, such as labeled diagrams.